#NCERT Class 12 Computer Science C

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CBSE Class 12 Computer Science and Informatics Practice

CBSE Class 12 Computer Science and Informatics Practice

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NCERT Solutions for Computer Science

NCERT Solutions for Computer Science Class 11 NCERT Solutions for Class 11 Computer Science (Python) Network Automation Python Fundamentals Python Programming Fundamentals for Class 11 and 12 Class 12 NCERT Solutions for Class 12 Computer Science (C++) Chapterwise Question Bank CBSE Class 12 Computer Science (C++) Important Questions for Class 12 Computer Science (C++) Important …

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How much does it cost to develop an e-learning app like Extra marks?

How much does it cost to develop an e-learning app like Extra marks?

E-Learning has evolved as a savior of life for students and teachers, especially during the Coronavirus Pandemic addict. This e-learning mobile application has changed the traditional method of educational processes throughout the world. When the spread of the Covid-19 pandemic has significantly affected the education segment. When there is no remaining option, people can continue their education outside the regular class settings only by efficient ways to induce results through e-learning applications.

About Extra marks:

Extra marks, an app with an enjoyable, thrilling, and collaborative way of eLearning with advanced features. It is unique in its way of precise via appealing visuals and amazing graphics, that resolve the queries within no time. Students can find innovative and accurate solutions for diverse topics on the app, via various graphics and collaborative learning segments, comprising projects, homework, tests, or assignments. Extra marks, is the only app that has solutions for all topics for all classes (KG to 12), for CBSE and ICSE Boards.

It has introduced an AI-supported study bot named Alex, which will aid students in learning the topics effectively at all times of need. You can easily click a picture of the queries of your choice and post it to get the answer.

Tailored Learning process This advanced bot crafts an innovative learning journey as it analyses the precise learning requirements and educational motives. It may employ surprise tests to understand the level of understanding, and adjust to the outcomes to meet the specific goals of the personalised learning process.

Another service called “Achieve” offers practical clearing of doubts with comprehensive supervision. It is a special feature that lets teachers use SNAAP (Student Needs Analysis and Academic Profile) to guarantee success in every student's journey.

The complete process of learning at Extra marks is supported by an innovative Reports and Analytics platform. This is crucial in understanding individual and relative student performance. By recognizing the gaps and strengths in your learning process. The student will have access to view complete figures on key metrics such as average time consumed for every query, accuracy, understanding capacity, etc. You will get total understanding via comparative ranking and breakdown. Be guaranteed to utilize an innovative process at all your future subjects via suggestions and alterations as per learning curve necessities.

The app covers complete topics from KG to grade 12 with the same level of zeal and competitiveness. It is popular among several educational apps in the country, as it is the one-stop solution for diverse subjects such as Maths, Science, Social Science, English, English Core, English Elective, Sanskrit, Hindi, Economics, Geography, History, Political Science, Business Studies, Accountancy, Physics, Biology, Computer Science (C++ and Python), Chemistry, Informatics Practices, Multimedia Web and Technology, etc. All the learning methodologies and topics are affiliated with NCERT books and cover all subjects comprising NCERT Solutions.

How much does it cost to develop an e-learning app like Extra marks?

Developing an innovative learning app like Extra marks requires detailed research on various key features for determining the overall cost. The development cost of developing an eLearning app like Extra marks is generally reliant on the below key points:

Operating Platforms:

Building the app on diverse platforms involves the usage of diverse technological aspects. The development cost of building on the Android platform would need consideration of testing on multiple devices that will increase the overall cost of the iOS platform. Few business owners will opt for cross-platform development to reach users across multiple platforms.

Design:

It is key to offer an intuitive and user-friendly design to engage any kind of app user. With students interacting with the app for prolonged periods, a design with simple, smooth yet exciting navigations will engage them for longer. Also, the impactful design will reach the maximum number of users to get maximum profits.

App Features:

The size of the app is dependent on the type, amount, and complexity of features and functionalities in the app. Few of the included features will be basic and a few may be extra premium elements that will highly impact the overall development costs. These advanced features might require the with 3rd party integration to provide error-free service to the users. To ensure a safe move in the initial periods, it is suggested to include only basic features in the MVP versions.

Technologies:

The type of technology utilized in the app has a straight impact on the overall cost of development. Further few libraries and tools will have open-source components while others may require extra charges. Therefore, the selection of technologies will influence the overall cost of development hugely. This needs you to strategize much earlier for avoiding surprises at the last minute.

App Size: The overall cost of building an app such as Extra marks increases with the increase in the app size. App size increases exponentially with the inclusion of complex features and functionalities. Hence, with the increase in these elements, there will be a guaranteed increase in the app size. It is suggested only to select appropriate features that are relevant to the users.

Maintenance works:

It is key for any successful E Learning app development company to offer reliable coverage of app development services including maintenance service after the release of the app. Maintenance is key in the long-term success of the app as it runs without any flaws.

Selection of app Development Company:

The location, expertise, and guidance of the mobile app development company are highly important. A knowledgeable team will produce an excellent app at the expected interval but a slightly higher price.

Final Thoughts:

If you have understood the importance of an eLearning app such as Extra marks, then choose a reliable E Learning app development company in New Delhi like Brillmindz. The skilled team possesses unmatched experience and knowledge in creating profitable mobile apps across multiple industries. There will be a guaranteed success due to the right reach of the target audience and the use of accurate technologies.

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NCERT Solutions for Class 12 Computer Science (C++) - C++ Revision Tour - CBSE Tuts

See on Scoop.it - NCERT Solutions

NCERT Solutions for Class 12 Computer Science (C++) – C++ Revision Tour TOPIC-1 Basics of C++ Very Short Answer Type Questions [1 mark each] Question 1: Write the related library function name based upon the given information in C++. Get single character using keyboard. This function is available in stdio.h file. To check whether given …

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https://www.extramarks.com/ncert-solutions/cbse-class-12/computer-science-cplusplus

Extramarks provide CBSE study material computer science cplusplus streams namely Introduction cplusplus revision tour, object-oriented programming, classes and objects. These books are prepared by well qualified, experts teachers and academic experts in their respective field. The contents in NCERT Books are written in a simpler manner and can be easily grasped.

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NCERT Class 12 Computer Science C Chapter 14 Networking and Open Source Concepts

NCERT Class 12 Computer Science - C++ :: Chapter 14 Networking and Open Source Concepts

UNIT – V : NETWORKING & OPEN SOURCE SOFTWARE

TOPIC-1 Communication Technoiogies

Very Short Answer Type Questions [1 mark each]

Question 1:What is Web Hosting?Answer:Web hosting is the service that makes our website available to be viewed by others on the Internet. A web host provides space on its server, so that other computers around the world can access our website by means of a network or modem.

Question 2:What is the difference between packet & message switching ?Answer:

Packet SwitchingMessage switchingThere is a tight upper limit on the block size. A fixed size of packet is specified.In message switching there was no upper limit.All the packets are stored in main memory in switching office.In message switching packets are stored on disk. This increases the performance as access time is reduced.

Question 3: Which protocol in used in creating a connection with a remote machine ?Answer:Telnet : It is an older internet utility that allow us to log on to remote computer system. It also facilitates for terminal emulation purpose.

Question 4:Which protocol is used to create a connection with a remote machine? Give any two advantage of using Optical Fibers.Answer:Telnet Two advantage of using Optical Fibers are

Capable of extremely high speed.

No Electromagnetic interference.

Extremely low attending

Question 5:What is cloud computing ?Answer:The sharing of computer resources (dedicated, time-shared, or dynamically shared servers) and related infrastructurer components (load balancers, firewalls, network storage, developer tools, monitors and management tools) to facilitate the deployment and operation of web and network based applications. Cloud computing relies on sharing of resources to achieve coherence and economies of scale, similar to a utility (like the electricity grid) over a network.

Question 6:Write two characterstics of Wi-Fi.Answer:

It is wireless network.

It is for short range.

Question 7:Expand the following :

GSM

GPRS

Answer:

GSM – Global System for Mobile Communication.

GPRS – General Packet Radio Service.

Question 8:Which type of network out of LAN, PAN and MAN is formed, when you connect two mobiles using Bluetooth to transfer a videoAnswer:PAN

Question 9:Write one characterstic each for 2G and 3G mobile technologies.Answer:2G networks primarily involve the transmission of voice information while 3G technology provides the additional advantage of data transfer.

Question 10:What is the difference between Packet switching and circuit switching techniques ?Answer:In circuit switching, a dedicated path exists from source to destination while in packet switching, there is no fixed path.

Question 11:Write two advantages of using an optical fibre cable over an Ethernet cable to connect two service stations, which are 200 m away from each other.Answer:Advantages of optical fibre :

Faster speed than ethernet

Lower Attenuation

Question 12:Identify the Domain name and URL from the following :https://ift.tt/2Rc5dG8Answer:Domain name – income.inURL – https://ift.tt/2Rc5dG8

Question 13:Write one advantage of bus topology of network. Also illustrate how four (4) computers can be connected with each other using bus topology of network.Answer:Advantage (benefits) of Linear Bus Topology is that the cable length required for this topology is the least compared to the other networks.Bus Topology of Network:

Question 14:Give one suitable example of each URL and Domain Name.Answer:URL: http://waltons.inDomain Name: gmail.com

Question 15:Write one advantage of star topology of network ? Also, illustrate how five (5) computers can be connected with each other using star topology of network.Answer:Advantage (benefits) of star toplogy:Easy to replace, install or remove hosts or other devices.

Question 16:Identify the type of topology on the basis of the following :(a) Since every node is directly connected to the server, a large amount of cable is needed which increases the installation cost of the network.(b) It has a single common data path connecting all the nods.Answer:(a) Star Topology(b) Bus Topology

Question 17:Expand the following :(a) VOIP(b) SMTPAnswer:(a) Voice Over Internet Protocol(b) Simple Mail Transfer Protocol

Question 18:Daniel has to share the data among various computers of his two offices branches situated in the same city. Name the network (out of LAN, WAN, PAN and MAN) which is being formed in this process.Answer:MAN

Question 19:ABC International School is planning to connect • all computers, each spread over a distance of 50 metres. Suggest an economic cable type having high speed data transfer to connect these computers.Answer:Optical Fibre Cable.

Question 20:Mahesh wants to transfer data within a city at very high speed. Write the wired transmission medium and type of network.Answer:Wired transmission medium – Optical fibre cable Type of network – MAN.

Question 21:Which device is used to connect all computers inside a lab ?Answer:Hub or Switch

Question 22:Which device is used to connect all computers to the internet using telephone wire ?Answer:RJ – 45. It is an eight wired connectors used to connect computers on a LAN.

Question 23:What is Wi-Fi Card ?Answer:Wi-Fi cards are small and portable cards that allow the computer to connect to the internet through a wireless network. The transmission is through the use of radio waves.

Question 24:Explain the purpose of a router.Answer:A router establishes connection between two network and it can handle network with different protocols. Using a routing table, routers make sure that the data packets are travelling through the best possible paths to reach their destination.

Question 25:Identify the type of topology from the following.(a) Each node is connected with the help of a single cable(b) Each node is connected with the help of independent cable with central switching.Answer:(a) Bus topology(b) Star topology

Question 26:What is the difference between LAN and MAN ?Answer:LAN : It is Local Area Network. The diameter is not more than a single building.WAN : It is Metropolitan Area Network. LAN spans a few kms while MAN spans 5-50 km diameter and is larger than a WAN.

Short Answer Type Questions-I [2 marks each]

Question 1:Write any 1 advantage and 1 disadvantage of Bus topology.Answer:Advantage : Since there is a single common data path connecting all the nodes, the bus topology uses a very short cable length which considerably reduces the installation cost. Disadvantage : Fault detection and isolation is difficult. This is because control of the network is not centralized in any particular node. If a node is faulty on the bus, detection of fault may have to be performed at many points on the network. The faulty node has then to be rectified at that connection point.

Question 2:SunRise Pvt. Ltd. is setting up the network in the Ahmedabad. There are four departments named as MrktDept, FinDept, LegalDept, SalesDept.Distance between varioud buldings is as given:

MrktDept to FinDept80 mMrktDept to LegalDept180 mMrktDept to SalesDept100 mLegalDept to SalesDept150 mLegalDept to FinDept100 mFinDept to SalesDept50 m

Number of Computers in the buildings :

MrktDept20LegalDept10FinDept08SalesDept42

(i) Suggest a cable layout of connections between the Departments and specify the topology.Star Topology should be used.(ii) Suggest the most suitable building to place the server by giving suitable reason.Answer:As per 80 – 20 rule, server should be placed in MrktDept because it has maximium no. of computers.(iii) Suggest the placement of (i) modem (ii) Hub/ Switch in the network.Answer:Each building should have hub/switch and moderm in case Internet connection is required.(iv) The organization is planning to link its sale counter situated in various part of the same city, which type of network out of LAN, WAN, MAN will be formed ? Justify.Answer:MAN (Metropolitan Area Network) as MAN network can be carried out in a city network.

Question 3:Name the protocol(i) Used to transfer voice using packet switched network.Answer:VAns.VOIP (Voice Over Internet Protocol)(ii) Used for chatting between 2 group or between 2 individuals.Answer:IRC (Internet Relay Chat)

Question 4:What is an IP Address ?Answer:IP address is a unique identifier for a node or host connection on an IP network. An IP address is a 32 bit binary number usually represented as 4 decimal values, each representing 8 bits, in the range 0 to 255 (know as octets) separated by decimal points. This is known as “dotted decimal” notation.Example : 140.179.220.200

Question 5:What is HTTP ?Answer:HTTP is a protocol that is used for transferring hypertext (i.e., text,graphic,image,sound,video,e tc,) between 2 computers and is particularly used on the world wideWeb (WWW).[1 mark for definition/explanation]

Question 6:Explain the importance of Cookies.Answer:When the user browses a website, the web server sends a text file to the web browser. This small text file is a cookie. They are usually used to track the pages that we visit so that information can be customised for us for that visit.

Question 7:How is 4G different from 3G?Answer:3G technology adds multimedia facilities such as video, audio and graphics applications whereas 4G will provide better than TV quality images and video-links.

Question 8:Illustrate the layout for connecting 5 computersin a Bus and a Start topology of Networks.Answer:Bus topologyOr any valid illustration of Bus and Star Topology.

Question 9:What is a spam mail ?Answer:Spam is the abuse of electronic messaging systems (including most broadcast media, digital delivery systems) to send unsolicited bulk messages indiscriminately.

Question 10:Differentiate between FTP and HTTPAnswer:FTP is a protocol to transfer files over the InternetHTTP is a protocol which allows the use of HTML to browse web pages in the World Wide Web.

Question 11:Answer:following, which is the fastest

wired and

wireless medium of communication ?

Answer:

Wired – Optical Fiber

Wireless – Infrared OR Microwave

Question 12:What is Worm ? How is it removed ?Answer:A worm is a self-replicating computer program. It uses a network to send copies of itself to other computers on the network and it may do so without any user intervention.Most of .the common anti-virus (anti-worm) remove worm.

Question 13:Out of the following, which all comes under cyber crime ?(i) Stealing away a brand new computer from a showroom.(ii) Getting in someone’s social networking account without his consent and posting pictures on his behalf to harash him.(iii) Secretly copying files from server of a call center and selling it to the other organization.(iv) Viewing sites on a internet browser.Answer:(ii) & (iii)

Question 14:Perfect Edu Services Ltd. is an educational organization. It is planning to setup its India campus at Chennai with its head office at Delhi. The Chennai campus has 4 main buildings – ADMIN, ENGINEERING, BUSINESS and MEDIA. [O.D, 2015]You as a network expert have to suggest the best network related solutions for their problems raised in (i) to (iv), keeping in mind the distances between the buildings and other given parameters.Shortest distances between various buildings.

ADMIN To ENGINEERING55 mADMIN to BUSINESS90 mADMIN to MEDIA90 mENGINEERING to BUSINESS55 mENGINEERING to MEDIA90 mBUSINESS to MEDIA45 mDELHI Head Office to CHENNAI Campus2175 km

Number of Computers Installed at various buildings are as follows :

ADMIN110ENGINEERING75BUSINESS40MEDIA12DELHI Head Office20

(i) Suggest the most appropriate location of the server inside the Chennai campus (out of the 4 buildings), to get the best connectivity for maximum no. of computers. Justify your answer.Answer:ADMIN (Due to maximum number of computers)ORMedia (Due to shorter distance from the other buildings)(ii) Suggest and draw the cable layout to efficiently connect various buildings within the Chennai Campus for connecting the computers.Answer:Anyone of the following(iii) Which hardware device will you suggest to be procured by the company to be installed to protect and control the internet uses within the campus ?Answer:Firewall OR Router(iv) Which of the following will you suggest to establish the online face-to-face communication between the people in the Admin Office of Chennai Campus and Delhi Head Office ?Answer:Cable TV

Question 15:What kind of data gets stored in cookies and how is it useful ?Answer:When a Website with cookie capabilities is visited, its server sends certain information about the browser, which is stored in the hard drive as a text file. It is as way for the server to remember things about the visited sites.

Question 16:Differentiate between packet switching over message switching ?Answer:Packet Switching : Follow store and forward principle for fixed packets. Fixes an upper limit for packet size.Message Switching : Follows store and forward principle for complete message. No limit on block size.

Question 17:Out of the following, which is the fastest(i) wired and(ii) wireless medium of communication ?Infrared, Coaxial Cable, Ethernet Cable, Microwave, Optical FiberAnswer:(i) Wired : Optical Fiber(ii) Wireless : Infrared OR Microwave

Question 18:What is Trojan Horse ?Answer:A Trojan Horse is a code hidden in a program, that looks safe but has hidden side effects typically causing loss or theft of data, and possible system harm.

Question 19:Out of the following, which all comes under cyber crime ?

Stealing away a brand new hard disk from a showroom.

Getting in someone’s social networking account without his consent and posting on his behalf.

Secretly copying data from server of an organization and selling it to tire other organization.

Looking at online activities of a friends blog.

Answer:(ii) & (iii)

Question 20:Write any two differences between twisted pair and coaxial pair cable.Answer:

Twisted PairCo-axial CableTheir bandwidth is not as high as coaxial cables.It has high bandwidth.A twisted pair consists of two copper wires twisted around each other (each has its own insulation around it) like a double helix.A coaxial cable consists of a copper wire core covered by an insulating material and a layer of conducting material over that.

Question 21:Write one advantage of Bus Topology of network, also, illustrate how 4 computers can be connected with each other using star topology of network.Answer:Cable length required for his topology is the least compared to other networks.ORAny other correct advantage of Bus Topology of network.Illustration of 4 computers connected with each other using star topology of network.

Short Answer Type Question-II [3 marks]

Question 1:Uplifting Skills Hub India is a knowledge and skill community which has an aim to uplift the standard of knowledge and skills in the society. It is planning to setup its training centres in multiple towns and villages pan India with its head offices in the nearest cities. They have created a model of their network with a city, a town and 3 villages as follows.As a network consultant, you have to suggest the best network related solutions for their issues/problems raised in (i) to (iv) keeping in mind the distance between various locations and given parameters.Shortest distance between various location :

VILLAGE 1 to B_TOWN2 KMVILLAGE 2 to B_TOWN1.0 KMVILLAGE 3 to B_TOWN1.5 KMVILLAGE 1 to VILLAGE 23.5 KMVILLAGE 1 to VILLAGE 34.5 KMVILLAGE 2 to VILLAGE 32.5 KMA CITY Head Office to B HUB25 KM

Number of Computers installed at various locations are as follows :

B_TOWN120VILLAGE 115VILLAGE 210VILLAGE 315A_CITY OFFICE6

Note :

• In Villages, there are community centres, in which one room has been given as training center to this organization to install computers.• The organization has got financial support from the government and top IT companies.

Suggest the most appropriate location of the SERVER in the BHUB (out of the 4 locations), to get the best and effective connectivity. Justify your answer.

Suggest the best wired medium and draw the cable layout (location to location) to efficiently connect various locations within the B HUB.

Which hardware device will you suggest to connect all the computers within each location of B_HUB ?

Which service/protocol will be most helpful to conduct live interactions of Experts from Head Office and people at all locations of B HUB ?

Answer:(i) B-TOWN can house the server as it has the maximum no. of computers.(ii) Optical fibre cable is the best for this star topology.(iii) Switch(iv) VoIP

Long Answer Type Questions [4 marks each]

Question 1:Indian School in Mumbai is starting up the network between its different wings. There are Four Buildings named as SENIOR, JUNIOR, ADMIN and HOSTEL as shown below.:The distance between various buildings is as follows:

ADMIN TO SENIOR200mADMIN TO JUNIOR150mADMIN TO HOSTEL50mSENIOR TO JUNIOR250mSENIOR TO HOSTEL350mJUNIOR TO HOSTEL350m

Number of Computers in Each Building :

SENIOR130JUNIOR80ADMIN160HOSTEL50

(b1) Suggest the cable layout of connections between the buildings.(b2) Suggest the most suitable place (i.e., building) to house the server of this school, provide a suitable reason.(b3) Suggest the placement of the following devices with justification, i Repeater i Hub/Switch(b4) The organisation also has inquiry office in another dty about 50-60 km away in hilly region. Suggest the suitable transmission media to interconnect to school and inquiry office out of the following : i Fiber optic cable, i Microwave, i RadiowaveAnswer:(b1)

(b2) Server can be placed in the ADMIN building as it has the maxium number of computer.(b3) Repeater can be placed between ADMIN and SENIOR building as the distance is more than 110 m.(b4) Radiowaves can be used in hilly regions as they can travel through obstacles.

Question 2:Vidya Senior Secondary Public School in Nainital is setting up the network between its different wings. There are 4 wings named as SENIOR(S), JUNIOR(J), ADMIN(A) and HOSTEL(H).Distance between various wings are given below :

Wing A to Wing S100 mWing A to Wing J200 mWing A to Wing H400 mWing S to Wing J300 mWing S to Wing H100 mWing J to Wing H450 m

 WingNumber of Computers

Wing AWing SWing JWing H

201505025

(ii) Name the most suitable wing where the Server should be installed. Justify your answer.(iii) Suggest where all Hub(s)/Switch(es) should be placed in the network.(iv) Which communication medium would you suggest to connect this school with its main branch in Delhi ?Answer:(i) Star Topology

(ii) Server should be in Wing S as it has the maximum number of computers.(iii) All Wings need hub/switch as it has more than one computer.(iv) Since the distance is more, wireless transmission would be better. Radiowaves are reliable and can travel through obstacles

Question 3:Trine Tech Corporation (TTC) is a professional consultancy company. The company is planning to set up their new offices in India with its hub at Hyderabad. As a network adviser, you have to understand their requirement and suggest them the best available solutions. Their queries are mentioned as (i) to (iv) below.Physical Locations of the blocks of TTC

Block to Block distances (in Mtrs.)

Block (From)Block (To)DistanceHuman ResourceConference110Human ResourceFinance40ConferenceFinance80

Expected Number of Computers to be installed in each block

BlockComputersHuman ResourceFinanceConference2512090

What will be the most appropriate block, where TTC should plan to install their server?

Draw a block diagram showing cable layout to connect all the buildings in the most appropriate manner for efficient communication.

What will be the best possible connectivity out of the following, you will suggest to connect the new setup of offices in Bangalore with its London based office.• Satellite Link• Infrared• Ethernet Cable

Which of the following device will be suggested by you to connect each computer in each of the buildings?• Switch• Modem• Gateway

Answer:(i) Finance block because it has maximum number of computers.(ii)

(iii) Satellite link(iv) Switch

Question 4:Tech Up Corporation (TUC) is a professional consultancy company. The company is planning to set up their new offices in India with its hub at Hyderabad. As a network adviser, you have to understand their requirement and suggest them the best available solutions. Their queries are mentioned as (i) to (iv) below.Physical Locations of the blocks of TUC

Block to Block distances (in Mtrs.)

Block (From)Block (To)DistanceHuman ResourceConference60Human ResourceFinance120ConferenceFinance80

Expected Number of Computers to be installed in each block

BlockComputersHuman ResourceFinanceConference2512090

What will be the most appropriate block, where TUC should plan to install their server?

Draw a block to block cable layout to connect all the buildings in the most appropriate manner for efficient communication.

What will be the best possible connectivity out of the following you will suggest to connect the new setup of offices in Bangalore with its London based office?• Infrared• Satellite Link• Ethernet Cable

Which of the following devices will be suggested by you to connect each computer in each of the buildings?• Gateway• Switch• Modem

Answer:(i) Human resource block because it has maximum number of computers.(ii)(iii) Satellite link(iv) Switch

Question 5:G.R.K International Inc. is planning to connect its Bengaluru Office Setup with its Head Office in Delhi. The Bengaluru Office G.R.K. inter-national Inc. is spread across and area of approx. 1 square kilometer, consisting of 3 blocks – Human Resources, Academics and Administration.You as a network expert have to suggest answers to the four queries (i) to (iv) raised by them.Note : Keep the distance’ between blocks and no. of computers in each block in mind, while providing them the solutions.

Shortest distances between various blocks :

Human Resources to Administration100 mHuman Resources to Academics65 mAcademics to Administration110 mDelhi Head Office to Bengaluru Office Setup2350 km

Number of Computers installed at various blocks are as follows:

BLOCKNo. of ComputersHuman Resources155Administration20Academics100Delhi Head Office20

Suggest the most suitable block in the Bengaluru Office Setup, to host the server. Give a suitable reason with your suggestion.

Suggest the cable layout among the various blocks within the Bengaluru Office Setup for connecting the Blocks.

Suggest a suitable networking device to be installed in each of the blocks essentially required for connecting computers inside the blocks with fast and efficient connectivity.

Suggest the most suitable media to provide secure, fast and reliable data connectivity between Delhi Head Office and the Bengaluru Office Setup.

Answer:

(i) Human Resources because it has maximum number of computers.(ii)

(iii) Switch(iv) Satellite link

Question 6:Rovenza Communications International (RCI) is an online corporate training provider company for IT related courses. The company is setting up their new campus in Kolkata. You as a network expert have to study the physical locations of various blocks and the number of computers to be installed. In the planning phase, provide the best possible answers for the queries (i) to (iv) raised by them.Block to Block Distances (in Mtrs.)

FromToDistance

Administrative BlockAdministrative BlockFinance Block

Finance Block FacultyRecording Block FacultyRecording Block

6012070

Expected Computers to be installed in each block

BlockComputers

Administrative BlockFinance BlockFaculty Recording Block

3020100

Suggest the most appropriate block, where RCI should plan to install the server.

Suggest the most appropriate block to block cable layout to connect all three blocks for efficient communication.

Which type of network out of the following is formed by connecting the computers of these three blocks?• LAN• MAN• WAN

Which wireless channel out of the following should be opted by RCI to connect to students from all over the world?• Infrared• Microwave• Satellite

Write two advantages of using open source software over proprietary software.

Which of the following crime(s) does not come under cybercrime ?

Copying some important data from a computer without taking permission from the owner of-the data.

Stealing keyboard and mouse from a shop.

Getting into unknown person’s social networking account and start messaging on his behalf.

Answer:(i) Faculty Recording Block.(ii) Bus Topology(iii) LAN(iv) Satellite connection(v) Advantages of open source over proprietary software :• Open source software’s source code is available, can be modified copied & distributed while propritary software can’t be change.• Open source is free while propriatary is paid.(vi) (ii) Stealing keyboard & mouse from-a shop.

Question 7:(a) What is the difference between domain name and IP address?(b) Write two advantages of using an optical fibre cable over an Ethernet cable to connect two sendee stations, which are 190 m away from each other.(c) Expertia Professsional Global (EPG) is an online, corporate training provider company for IT related courses. The company is setting up their new campus in Mumbai. You as a network expert have to study the physical locations of various buildings and the number of computers to be installed. In the planning phase, provide the best possible answer for the queries (i) to (iv) raised by them.Building to Building Distances (in Mtrs.)

FromToDistance

Administrative BuildingAdministrative BuildingFinance Building

Finance BuildingRecording Studio BuildingFaculty Studio Building

6012070

Expected Computers to be installed in each Building:

BuildingComputers

Administrative BuildingFinance BuildingFaculty Studio Building

2040120

Suggest the most appropriate building, where EPG should plan to install the server.

Suggest the most appropriate building to building cable layout to connect all three buildings for efficient communication.

Which type of network out of the following is formed by connecting the computers of these three buildings?• LAN• MAN• WAN

Which wireless channel out of the following should be opted by EPG to connect to students of all over the world?• Infrared• Microwave• Satellite

Answer:(a) Domain Name is alphanumeric address of a resource over network IP address is a Numeric Address of a resoure in a Network. Example :Domain NameWWW.Gabsclasses.comIP Address102.112.0.153(b) Optical fibre Advantages :(i) Faculty Studio Building.(ii) Bus Topology.Faculty FinanceAdministrative BuildingStudio Building(iii) LAN(iv) Satellite

Question 8:To provide telemedicine faculty in a hilly state, a computer network is to be setup to connect hospitals in 6 small villages (VI, V2, …, V6) to the base hospital (H) in the state capital. This is shown in the following diagram.No village is more than 20 km away from the state capital.Imagine yourself as a computer consultant for this project and answer the following questions with justification :

Out of the following what kind of link should be provided to setup this network :

Microwave link,

Radio Link,

Wired Link ?

What kind of network will be formed; LAN, MAN, or WAN ?

Many times doctors at village hospital will have to consult senior doctors at the base hospital. For this purpose, how should they contact them: using email, sms, telephone, or video conference ?

Out of SMTP and POP3 which protocol is used to receive emails ?

What are cookies in the context of computer networks?

Rajeshwari is trying for on-line subscription to a magazine. For this she has filled in a form on the magazine’s web site. When the clicks submit button she gets a message that she has left e-mail field empty and she must fill it. For such checking which type of script is generally executed; client side script or server-side script ?

Mention any one difference between free-ware and free software.

Answer:(i) Radio Link(ii) MAN(iii) e-mail(iv) POP3(v) Cookies are files that store user information that is used to identify the user when he logs into the system.(vi) Server-side script.(vii) Freeware is a software that has the user to get unlimited usage. Free software may be free for a certain period’only.

Question 9:Work a lot Consultants are setting up a secured network for their office campus at Gurgaon for their day-to-day office and web- based activities. They are planning to have connectivity between three buildings and the head office situated in Mumbai. Answer the questions (i) to (iv) after going through the building positions in the campus and other details, which are given below:Distances between various buildings :

Building “GREEN” to Building “RED”110 mBuilding “GREEN” to Building “BLUE”45 mBuilding “BLUE” to Building “RED”65 mGurgaon Campus to Head Office1760 km

Number of computers

Building “GREEN”32Building “RED”150Building “BLUE”45Head Office10

Suggest the most suitable place (i.e., building) to house the server of this organization. Also give a reason to justify your suggested location.

Suggest a cable layout of connections between the buildings inside the campus.

Suggest the placement of the following devices with justification:

Repeater.

Switch.

The organization is planning to provide a high speed link with its head office situated in Mumbai using a wired connection. Which of the following cables will be most suitable for this job ?

Optical Fibre

Coaxial Cable

Ethernet Cable

Answer:(i) The most suitable place to install server is building “RED” because this building has maximum computer which reduce communication delay.(ii) Cable layout is Bus topology(iii) Since the cabling distance between buildings GREEN, BLUE and RED are quite large, so a repeater, would ideally be needed along their path to avoid loss of signals during the course of data flow in there routes.(2) In the layout a switch each would be needed in all the building, to interconnect the group of cables from the different computers in each building.(iv) Optical fibre.

Question 10:Granuda Consultants are setting up a secured network for their office campus at Faridabad for their day to day office and web based activities. They are planning to have connectivity between 3 building and the head office situated in Kolkata. Answer the questions (i) to (iv) after going through the building positions in the campus and other details, which are given below :Distances between various buildings :

Building “RAVI” to Building “JAMUNA”120 mBuilding “RAVI” to Building “GANGA”50 mBuilding “GANGA” to Building “JAMUNA”65 mFaridabad Campus to Head Office1460 km

Number of computers

Building “RAVI”25Building “JAMUNA”150Building “GANGA”51Head Office10

Suggest the most suitable place (i.e., block) to house the server of this organization. Also give a reason to justify your suggested location.

Suggest a cable layout of connections between the buildings inside the campus.

Suggest the placement of the following devices with justification:

Repeater

Switch

The organization is planning to provide a high speed link with its head office situated in the KOLKATA using a wired connection. Which of the following cable will be most suitable for this job ?

Optical Fibre

Coaxial Cable

Ethernet Cable

Answer:(i) The most suitable place to install server is in building “JAMUNA” because this building has maximum computer which reduce the communication delay.(ii) Cable layout. (Bus topology).(iii) (1) Since the cabling distance between buildings RAVI, GANGA and JAMUNA are quite large, so a repeater, would ideally be needed along their path to avoid loss of signals during the course of data flow in these routes.(2) In the layout a switch would be needed in all the building, to interconnect the group of cables from the different computers in each building.(iv) Optical fibre.

Question 11:Rehaana Medicos Center has set up its new center in Dubai. It has four buildings as shown in the diagram given below :Distances between various buildings are as follows:

Accounts to Research Lab55 mAccounts to Store150 mStore to Packaging Unit160 mPackaging Unit to Research Lab60 mAccounts to Packaging Unit125 mStore to Research Lab180 m

Number of computers

Accounts25Research Lab100Store15Packaging Unit60

As a network expert, provide the best possible answer for the following queries :

Suggest a cable layout of connections between the buildings.

Suggest the most suitable place (i.e. buildings) to house the server of this origanization.

Suggest the placement of the following device with justification :(a) Repeater(b) Switch/Hub

Suggest a system (hardware/sofware) to prevent unauthorized access to or from the network.

Answer:(i) Layout 1(ii) The most suitable place/building to house the server of this organization would be in Research Lab, building as this building contains the maximum number of computers.(iii) (a) For layout I, since the cabling distance between Accounts to Store is quite large, so a repeater would ideally be needed along their path to avoid loss of signals during the course of data flow in this route. For layotat2, since the cabling distance between Store to Research Lab is quite large, so a repeater would ideally be placed.(b) In both the layouts, a Flub/Switch each would be needed in all the buildings to interconnect the group of cables from the different computers in each building.(iv) Firewall

Question 12:Who is a hacker ?Answer:A computer enthusiast, who uses his computer . programming skills to intentionally access a computer without authorization is known as hacker. A hacker accesses the computer without the intention of destorying data or maliciously harming the computer.

Question 13:The following is a 32 bit binary number usually represented as 4 decimal values, each representing 8 bits, in the range 0 to 255 (know as octets) separated by decimal points. 140.179.220.200What is it? What is its importance?Answer:It is an IP Address. It is used to identify the computers on a network.

TOPIC-2Network Security and Web Service

Very Short Answer Type Questions [1 mark each]

Question 1:Define firewall.Answer:A system designed to prevent unauthorized access to or from a private network is called firewall. It can be implemented in both hardware and software or combination of both.

Question 2:Write any two examples of Server side Scripts.Answer:

ASP

PHP

Question 3:What is the difference between E-mail & chat?Answer:

Chat occurs in near real time, while E-mail doesn’t.

Chat is a 2-way communication which require the permission of both parties, while E-mail is a 1-way communication.

Question 4:Write names of any two popular open source software, which are used as operating systems.Answer:

Kernels

Unix

Linux

Question 5:What is the difference between video conferencing and chat.Answer:In conference, we can include more than one person and it allows text, video and audio while chat is one-to-one communication.

Question 6:Expand the following abbreviations :

HTTP

VOIP

Answer:

HTTP-Hyper Text Transfer Protocol.

VOIP-Voice Over Internet Protocol.

Question 7:What is the difference between HTTP and FTP?Answer:Hyper Text Transfer Protocol deals with Transfer of Text and Multimedia content over internet while FTP (File Transfer Protocol) deals with transfer of files over the internet.

Question 8:What out of the following, will you use to have an audio-visual chat with an expert sitting in a far-away place to fix-up a technical issue ?

VOIP

Email

FTP

Answer:(i) VOIP

Question 9:Name one server side scripting language and one client side scripting language.Answer:Client Side :

JAVASCRIPT

VBSCRIPT

Server Side :

ASP

JSP

Question 10:Which out of the following comes under cyber crime ?

Operating someone’s internet banking account, without his knowledge.

Stealing a keyboard from someone’s computer.

Working on someone’s Computer with his/ her permission.

Answer:(i) Operating someone’s internet banking account, without his knowledge.

Question 11:Name two proprietary softwares along with their application.Answer:

MS-Office – All office applications MS-Word, MS-Excel, MS-PowerPoint.

Visual Studio – Visual Basic, Visual C+ + softwares for application development.

Question 12:Name some cyber offences under the IT Act.Answer:

Tampering with computer source documents

Hacking.

Publishing of information which is obscene in electronic form.

Question 13:What are the 3 ways of protecting intellectual property ?Answer:

Patents

Copyrights

Trademark

Question 14:When a user browses a website, the web server sends a text file to the web browser. What is the name of this ?Answer:Cookies.

Short Answer Type Questions – I [2 mark each]

Question 1:Define the following :

Firewall

VoIP

Answer:(i) Firewall : A system designed to prevent unauthorized access to or from a private network is called firewall. It can be implemented in both hardware and software or combination of both.(ii) VoIP : Voice -over-Internet Protocol(VoIP) is a methodology and group of technologies for delivering voice communications and multimedia sessions over Internet Protocol(IP) networks, such as the Internet.

Question 2:Give the full form of the following terms.

XML

FLOSS

HTTP

FTP

Answer:

XML: Extensible Markup Language.

FLOSS: Free-Libre Open Source Software.

HTTP: Hyper Text Transfer Protocol.

FTP: File Transfer Protocol.

Question 3:Differentiate between WORM and VIRUS in Computer terminology.Answer:VIRUS directly effects the system by corrupting the useful data. A computer virus attaches itself to a program or file enabling it to spread from one computer to another.A worm is similar to a virus by design and is considered to be sub class of a virus. Worm spread from computer to computer, but unlike a virus, it has the capability to travel without any human action.

Abbrevations :Question 4:Expand the following

GSM

GPRS.

Answer:

GSM : Global System for Mobile Communication.

GPRS : General Packet Radio Service.

Question 5:Expand the following abbreviations :

HTTP

VOIP

Answer:

HTTP : Hyper Text Transfer Protocol.

VOIP : Voice Over Internet Protocol.

Question 6:Give the full form of :

FOSS

HTTP

Answer:

FOSS : Free Open Source Software.

HTTP : Hyper Text Transfer Protocol.

Question 7:Write the full forms of the following :

GNU

XML

Answer:

GNU : GNU’s Not Unix

XML : Extensible Markup Language.

Question 8:Expand the following terminologies :

GSM

WLL

Answer:

GSM : Global System for Mobile Communication

WLL : Wireless Local Loop.

Question 9:Give the full forms of the following terms :

CDMA

TDMA

FDMA

Answer:

CDMA : Code Division Multiple Access

TDMA : Time Division Multiple Access

FDMA : Frequency Division Multiple Access

Question 10:Expand the following abbreviations :

FTP

TCP

SMTP

VOIP

Answer:

FTP : File Transfer Protocol

TCP : Transmission Control Protocol.

SMTP : Simple Mail Transfer Protocol.

VOIP : Voice Over Internet Protocol.

Short Answer Type Questions-II [3 marks each]

Question 1:Give two examples of PAN and LAN type of networks.Answer:

PANLAN(i) Personal Area Network(ii) Spans a few metersExample :Bluetooth using 2 moblies and laptops sharing files.(i) Local Area Network(ii) Spans upto a km.Example :System in a lab in a school, systems at home.

Question 2:Which protocol helps us to browse through web pages using internet browsers ? Name any one internet browser.Answer:HTTPGoogle Chrome is a browser

Question 3:Write two advantages of 4G over 3G Mobile Telecommunication Technologies in terms of speed and services.Answer:4G has very high data rates upto 100 Mbps.It covers a wider lange than 3G

Question 1:Write two characteristics of Web 2.0Answer:Web 2.0

dynamic and interactive websites

Only the changed part is reloaded so faster.

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LearnCBSE in NCERT Solutions for Class 12 Computer Science (C++)

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NCERT Solutions for Class 12 Computer Science (C++)

NCERT Solutions for Class 12 Computer Science solved by expert teachers at LearnCBSE.in to help students to score good marks in the board exams.

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NEET preparation tips not just empower the likelihood to plan a practical technique

Best NEET coaching institute in Dehradun Best IIT coaching institute in dehradun

NEET preparation tips not just empower the likelihood to plan a practical technique to prepare for the test yet moreover help them score high checks. The National Eligibility Entrance Test (NEET) is a significantly forceful therapeutic choice test. Up-and-comers who passed class twelfth with half-complete stamps in Physics, Chemistry, Biology are simply able to apply for the test. Reliably more than 10 lac understudies apply for NEET and devour the 12 PM oil to break the test. Due to the outrageous test, candidates applying for the test need to lock in for Best NEET Coaching Institute in Dehradun for preparation. The test has three zones thus as to break the test in the chief undertaking, candidates need to put proportional vitality in arranging of all subjects solicited in NEET.

About NEET

Started s All India Pre Medical Test (AIPMT), the restorative situation test transformed into the National Eligibility Entrance Test (NEET) in 2012. By and by, this is the principle national level arrangement test in India for the assertion in therapeutic colleges for MBBS and BDS courses. Candidates who need to get admission to open and private helpful colleges in India need to fill NEET application structure and appear for the test that is driven in May every year. Up-and-comers who meet NEET capability criteria of passing class twelfth with least half checks in PCB can apply for the test. Up-and-comers who meet NEET cut-off and achieve top AIR positions simply get arranges in all India government remedial and dental colleges under 15% spared share.

Change in NEET Conducting Body and Exam Format

The test used to be coordinated by the Central Board of Secondary Education (CBSE), but at this point the as of late encircled National Testing Agency (NTA) will lead the test. NTA will lead NEET, 2019 onwards to empower understudies to get affirmation in tops open and tuition-based schools offering MBBS and BDS courses across over India.

No ifs, ands or buts, NEET is one of the hardest situation tests in India, yet by following the benefit NEET course of action tips and tricks, you can break it viably. Check the blog, to find some obliging NEET 2019 course of action tips:

How To Prepare For NEET?

NEET is one of the hardest arrangement tests to clear which understudies need to try hard. They need to get every chance to master the test with top positions and secure a seat in a remedial school of their choice. From going to top instructional courses to implying recorded video talks and other assessment material, understudies research each likelihood to get high position in the therapeutic determination test. In any case, with this tireless work, candidates in like manner need to have an undeniable NEET preparation system. Here are some NEET 2019 arranging tips to empower you to start your voyage towards the achievement of your dream about transforming into an expert.

1. Grasp NEET Exam Pattern

First and the most noteworthy arranging tip for NEET is to have a sensible cognizance of the test plan. NEET test model empowers you get an idea of the sort of request represented, the outright term of the test, subjects verified, checking plan and other critical nuances reliant on which you can structure your NEET course of action plan.

NEET Exam Pattern

S. No.

Particulars

Details

1

Mode of Examination

CBT (Computer Based Test)

2

Exam Duration

3 hours

3

Languages

English, Hindi, Assamese, Bengali, Gujarati, Marathi, Tamil, Telugu, Oriya, Kannada and Urdu

4

Type of Questions

Multiple Choice Questions (MCQ)

5

Sections

Physics – 45 Questions

Chemistry – 45 Questions

Biology – 90 Questions

6

Total Number of Questions

180 Questions

7

Total Marks

720 Marks

8

Marking Scheme

4 marks for each correct answer 1 mark will be deducted for each wrong answer

2. Check NEET plan

Next NEET game plan tip to get high scores in the test is to encounter the all out outline. From the subjects to the focuses covered in them, you should intentionally check the complete NEET plan. NEET timetable is enormous and to complete it in a confined time, you need to make a practical arranging plan. Having a thorough perception of NEET calendar won't just empower you to make a practical assessment plan yet will similarly empower you to save important time on subjects that can be verified quickly and adequately. In light of the subjects covered in the test and your request on them, you can pick the regions that need more practice than others and can commit greater chance to them.

NEET Syllabus 2019

Material science – Mechanics, Optics, Thermodynamics and Nuclear Physics

Science – Mole Concept, General Organic Chemistry, Periodic Table, Chemical Bonding, Coordination Chemistry

Science – Ecology and Environment, Genetics, Cell Biology; Morphology, Reproduction, and Physiology of Plants and Animals; Basics of Biotechnology

3. Make a sensible report plan

Directly when you think about NEET test model and timetable, this is a perfect chance to make a convincing and result-arranged examination plan. When making an examination course of action for NEET arranging, guarantee that you utilize your time commendably and make a suitable timetable. Set your destinations, figure the outright time open with you for NEET 2019 availability, check the advantages and a while later make a schedule to consider. Plan your weeks early by observing down the areas who need to cover.

4. Pick the best NEET study material

Assurance of the right assessment material is the best approach to achievement in the restorative position test. Despite how dedicatedly you prepare for the test, in case you don't approach the right assessment material, you can't achieve your target. Be it printed study material, accounts, advanced books or test plan, guarantee you get it from a strong training foundation. Consider taking help of your teachers or aides when implying additional examination material than given by your preparation foundation.

Luckily, in the present digitized world you don't need to depend just on NCERT books to complete NEET plan. To give indications of progress request on the thoughts and to understand them quickly, you can go to live natural classes or can in like manner watch recorded video addresses. With a blend of visuals, graphs, and blueprints, accounts make it less complex for the understudies to get and hold the information.

Despite the NCERT books and recorded video addresses, you can in like manner suggest the underneath offered books to cover NEET plan 2019.

Physics

Chemistry

Biology

Problems in General Physics by I.E. Irodov

Modern Approach to Chemical Calculations – R. C. Mukherjee

Objective NCERT at Your Fingertips for NEET

The Feynman Lectures on Physics Vol. I & Vol. II

Organic Chemistry – MConcise Inorganic Chemistry – J. D. Leeorrison and Boyd

M.S. Chauhan

Books by T.L Rayar

Concepts of Physics Vol I and II by H.C. Verma

Physical Chemistry for Medical Entrance by OP Tandon

Trueman’s Elementary Biology Volume – I and Volume – II

5. Clear your thoughts

Presumably, the principle inspiration driving frustration in NEET test is dim thoughts. Understudies as a general rule skirt the topics when they are not prepared to get their inquiries cleared. This looks like tolerating a titanic peril as nobody can tell which territory or subject will have what number of requests.

In case you have a question in any region, guarantee you experience the subject again and again until you expert it. If you imagine that it's difficult to appreciate it by basically getting it, take the help of your educators. Understudies, who feel shy to represent the request in the examination lobby can download NRT India iTutor application and can pose their inquiries direct from the practiced NRTIndia faculty in 'Ask an Expert' territory.

6. Change NEET Syllabus reliably

Despite how savvy someone is, reviewing the monstrous plan of Best NEET coaching institute in Dehradun is basically immeasurable without standard adjustment. You should typically refresh the outline you spread. You can make seven days by week, fortnightly or month to month change mean to perceive how well you are going with your examination plan for NEET 2019 course of action.

Furthermore check: NEET 2019 Revision Strategies for 3 Months

7. Handle NEET Test Series

Essentially pressing the thoughts and encountering the calendar again and again won't take you wherever until you check your headway reliably. Likewise, maybe the best ways to deal with check the sum you have instructed is to clarify NEET test plan. In case you feel that the test course of action given by your preparation foundation isn't adequate, you can buy NEET consistently practice tests or fake tests online to reliably quantify your show. It will moreover empower you to grasp your worry zones subject to which you can take off required upgrades in your NEET arranging plan.

As NEET will be right now an online test, you also need to plan for the changed model and this is possible exactly when you practice enough online tests. Understand indistinguishable number of online tests from you can to appreciate the methodology of CBT and make your frameworks for the test day. It will in like manner empower you to support your assurance.

8. Make notes

Encountering all out books each time presumably won't be doable for each understudy. Besides, this isn't required when you have recently encountered the outline and saw all of the subjects. Or on the other hand perhaps, you can make short notes to improve your memory capacities. You can note down the huge centers, formula, and theories in an alternate scratch cushion, which you can encounter each earlier day resting. It will empower you to recall the things for additional.

9. Work on progressively delicate districts

Standard tests by the educating foundation help you grasp the domains that need more practice and alteration. Sometimes understudies consider their delicate locales, yet simultaneously, copy through a huge amount of time on reevaluating the strong territories as they find them captivating. Acknowledge it as a noteworthy NEET 2019 arranging tip and assurance that you put enough vitality in the slight areas to change over them into your characteristics. You can watch chronicles, take help of your educators or can discuss the thoughts with the companions to understand the problematic fragments.

10. Fathom Mock tests and prior year's NEET papers

Time is one of the best fundamental concentrations with respect to NEET. Understudies need to utilize every minute commendably to attempt 180 request in 180 minutes. Brilliantly, you get just a single minute for each question and to ensure that you attempt the best number of request in the given time, you really need to lock in on your speed. Venturing through phony tests is maybe the best ways to deal with help your speed.

You should handle NEET phony tests and prior year papers. Beside improving your speed, this moreover causes you understand the certifiable state of the appraisal hall, question paper plan, prior year's examples and the kind of request presented in the test. In light of your display in the bogus tests, you can plan your frameworks to commendably try request in the certified test. To expand most noteworthy benefit by NEET prior year papers and phony tests, make veritable evaluation hall like condition at your home, set a clock and clarify the request.

When you are done with the test, check your introduction and separate it fittingly with the help of the reports given by the establishment. You can in like manner speak with your teacher to get their info and work on the proposition given by them.

11. Avoid essential misunderstandings

To a great extent understudies disregard to break NEET in light of some essential slip-ups. Thinking about the normal slip-ups made by NEET understudies causes you improve your chances of scoring top situation in the test. Here are the slip-ups you need to keep up a key good ways from to ensure your accomplishment in NEET 2019:

             Not following the timetable

             Not making handy goals

             Referring to more than required examination material

             Skipping subjects

             Not venturing through enough false tests

             Ignoring prosperity

12. Focus on your prosperity

Clearing the NEET test in one undertaking is to be sure the dream of every candidate anyway not to the detriment of your prosperity. You will have the alternative to perform well in the test exactly when you are strong. Make a timetable that consolidates enough breaks and loosening up time. You should in like manner focus on your eating routine and eat well sustenance. Get all out rest as it makes you feel fresh and energetic just as it causes you improve your obsession control. Guarantee you give your cerebrum adequate chance to loosen up, which is possible just by taking brief breaks and following a typical rest cycle.

13.         Subject Wise NEET Preparation Tips

             NEET Preparation Tips for Physics

Appreciate the central thoughts given in the NCERT books in any case NEET plan for Physics. It won't just empower you to prepare for your board tests yet will moreover empower you to fortify your central thoughts. When you are done with the NCERT books, you can insinuate various books or accounts for forefront subjects covered in the plan of NEET.

             NEET Preparation Tips for Chemistry

Science is continuously about speculative thoughts, substance conditions, and issues, which you should prepare by encountering NCERT books and other examination material made by the experienced workforce. Thusly, make sure to make notes of different conditions to change them reliably. You can in like manner watch recorded video addresses on Inorganic, Organic and Physical science.

             NEET Preparation Tips for Biology

This is the most critical subject for the up-and-comers attempting to take admission to MBBS and BDS courses. Further, Biology is given more weight in NEET question paper than Chemistry and Physics. From now on, you ought to be clear with different requests to attempt requests in the test. Additionally, this is possible just with a standard update of the subject with preparing tests.

These are some valuable and easy to-seek after NEET preparation tips every wannabe envisioning to clear restorative situation test must seek after. These game plan tips for NEET 2019 will empower you to score a better than average All India Rank (AIR) to get admission to one of the top remedial schools in India.

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NCERT Solutions for Class 12 Computer Science (C++) - Solved Paper, 2017 (Outside Delhi Set) - CBSE Tuts

See on Scoop.it - NCERT Solutions

Contents1 NCERT Solutions for Class 12 Computer Science (C++) – Solved Paper, 2017 (Outside Delhi Set)1.1 SECTION – A1.2 SECTION – C NCERT Solutions for Class 12 Computer Science (C++) – Solved Paper, 2017 (Outside Delhi Set) SECTION – A (Only for Candidates, who opted for C++) Question 1: (a) Write the type of C+ …

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Swayam Prabha, a great initiative by the Ministry of Human Resource Development under which 32 DTH channels are being used to telecast live lectures on different education subjects. 32 DTH channels through DTH (Direct to Home) are being used to broadcast study content for school and college students.

Launched on 9th July, 2017 by the Ministry of Human Resource Development, high quality educational content is being broadcasted on these channels using the GSAT-15 satellite. The channels provides at least 4 hour of new content every day while the content is repeated 5 times throughout the day which allows the students to pick time to lean as per their convenience.

The archive of the content provided on Swayam Prabha channels is available to watch on Youtube while the channels can be watched live on two DTH services including Dish TV and DD Free Dish.

Watch Swayam Prabha Channels Online

The archive content of all 32 Swayam Prabha channels can be viewed online on Youtube and the Swayam Prabha mobile app. Below are the links to watch Swayam Brabha Channels online.

Channel No. Channel Name Channel Route/Parent Watch Online Channels 01-10 are managed by CEC, New Delhi. National Coordinator is Dr.Rajbir Singh, Director, CEC, New Delhi. 1 Channel 01: CEC/UGC: Humanities- 1, Language and Literature EMRC, EFLU, Hyderabad (The English and Foreign Languages University) Click to Watch 2 Channel 02: CEC/UGC: Humanities- 2, Arts, History,Philosophy and related Subjects CEC, New Delhi Click to Watch 3 Channel 03: CEC/UGC: Social Science -1, Sociology, Political Science and related subjects CEC, New Delhi Click to Watch 4 Channel 04: CEC/UGC: Social Science – 2, Education, Psychology, Home Science and related subjects CEC, New Delhi Click to Watch 5 Channel 05: CEC/UGC: Social Science – 3, Management, Library Science, Information Science and related subjects EMRC / MCRC, Jamia Millia Islamia, New Delhi Click to Watch 6 Channel 06: CEC/UGC: Social Science – 4, Law, Legal Studies, Human Rights and related subjects EMRC, Punjabi University, Patiala Click to Watch 7 Channel 07: CEC/UGC: Economics, Commerce and Finance EMRC, Gujarat University,Ahmedabad Click to Watch 8 Channel 08: CEC/UGC: Physical sciences, Mathematics, Physics, Chemistry and related Subjects EMRC ,University of Calicut Click to Watch 9 Channel 09: CEC/UGC: Life Sciences, Botany, Zoology, Bio-Science and related subjects EMRC, Kashmir University, Srinagar Click to Watch 10 Channel 10: CEC/UGC: Applied Sciences, Allied Physical and Chemical sciences and related subjects EMRC, Anna University, Chennai Click to Watch Channels 11 to 18 are Managed by NPTEL. National Coordinator: Prof. Kushal Sen, IIT Delhi 11 Channel 11: NPTEL: Chemical Engineering, Chemistry and related Subjects IIT Kharagpur Click to Watch 12 Channel 12: NPTEL: Civil Engineering and related subjects IIT Delhi Click to Watch 13 Channel 13: NPTEL: Computer Science and Engineering IIT Kharagpur Click to Watch 14 Channel 14: NPTEL: Electrical engineering, Electronics and Communication Engineering and related subjects IIT Delhi Click to Watch 15 Channel 15: NPTEL: Engineering Sciences and general subjects for engineering IIT Madras Click to Watch 16 Channel 16: NPTEL: Humanities, Social Sciences and Management IIT Kanpur Click to Watch 17 Channel 17: NPTEL: Mechanical Engineering and related subjects IIT Kanpur Click to Watch 18 Channel 18: NPTEL: Mathematics, Physics, Metallurgy and related subjects IIT Tirupati / IIT Madras Click to Watch Channels 19 -22 are managed for high School students by IIT Delhi and is called IIT PAL. The National Coordinator is Prof. Ravi Soni, IIT Delhi 19 Channel 19: IIT PAL: Biology IIT PAL 1 IIT Delhi Click to Watch 20 Channel 20: IIT PAL: Chemistry IIT PAL 2, IIT Delhi Click to Watch 21 Channel 21: IIT PAL: Mathematics IIT PAL 3. IIT Delhi Click to Watch 22 Channel 22: IIT PAL: Physics IIT PAL 4, IIT Delhi Click to Watch Channels 23 to 26 are managed by IGNOU New Delhi. The National Coordinator is Prof. Uma Kanjilal, IGNOU, New Delhi 23 Channel 23: IGNOU: Liberal Arts and Humanities IGNOU, New Delhi Click to Watch 24 Channel 24: IGNOU: Agriculture, Vocational and Allied Sciences IGNOU, New Delhi Click to Watch 25 Channel 25: IGNOU: Culture IGNOU, New Delhi Click to Watch 26 Channel 26: IGNOU: State Open Universities’ programs IGNOU, New Delhi Click to Watch Channels 27 and 28 are managed by the NIOS, New Delhi. The National Coordinator is Prof. C. B. Sharma, Chairman, NIOS 27 Channel 27: NIOS: Secondary School Education NIOS, New Delhi Click to Watch 28 Channel 28: NIOS: Higher Secondary School Education NIOS, New Delhi Click to Watch Channels 29 and 30 are managed QEEE, IIT Madras. Prof. Ahsok Jhunjhunwala, IIT Madras is the National Coordinator 29 Channel 29: QEEE: QEEE 1 (Live classes in Engineering and Technology) IIT Madras Click to Watch 30 Channel 30: NPTEL: Mathematics IIT Madras Click to Watch Channel 31 is managed by NCERT 31 Channel 31: NCERT: School and Teacher Education NCERT, New Delhi Click to Watch Channel 32 is managed by IGNOU and NIOS jointly 32 Channel 32: IGNOU and NIOS: Teacher Education IGNOU and NIOS, New Delhi Click to Watch

NOTE: Click on the Youtube Icon against the topic row in the last column of the table to watch the lecture online on Youtube.

Watch Swayam Prabha Channels On Dish TV

All the 32 channels of Swayam Prabha can also be watched on Dist TV DTH and DD Free Dish. To watch the channels on Dish TV, switch to channel number 2001 onwards. Channels on Dish TV are available with the name “MHRD ‘Channel Number'”, i.e. for channel number 1, it is “MHRD 1” on Dish TV channel number 2001.

MHRD 32 Swayam Prabha Channel on Dish TV Channel No. 2032

Instructions to configure and watch Swayam Prabha channels on DD Free Dish are given at the below link.

Configure DD Free Dish for Swayam Prabha Channels

Download Swayam Prabha App

The schedule, program timings and archive videos of lectures is also available on the Swayam Prabha android app which can be downloaded from the below link.

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NCERT Class 12 Computer Science C Chapter 14 Networking and Open Source Concepts

NCERT Class 12 Computer Science - C++ :: Chapter 14 Networking and Open Source Concepts

UNIT – V : NETWORKING & OPEN SOURCE SOFTWARE

TOPIC-1 Communication Technoiogies

Very Short Answer Type Questions [1 mark each]

Question 1:What is Web Hosting?Answer:Web hosting is the service that makes our website available to be viewed by others on the Internet. A web host provides space on its server, so that other computers around the world can access our website by means of a network or modem.

Question 2:What is the difference between packet & message switching ?Answer:

Packet SwitchingMessage switchingThere is a tight upper limit on the block size. A fixed size of packet is specified.In message switching there was no upper limit.All the packets are stored in main memory in switching office.In message switching packets are stored on disk. This increases the performance as access time is reduced.

Question 3: Which protocol in used in creating a connection with a remote machine ?Answer:Telnet : It is an older internet utility that allow us to log on to remote computer system. It also facilitates for terminal emulation purpose.

Question 4:Which protocol is used to create a connection with a remote machine? Give any two advantage of using Optical Fibers.Answer:Telnet Two advantage of using Optical Fibers are

Capable of extremely high speed.

No Electromagnetic interference.

Extremely low attending

Question 5:What is cloud computing ?Answer:The sharing of computer resources (dedicated, time-shared, or dynamically shared servers) and related infrastructurer components (load balancers, firewalls, network storage, developer tools, monitors and management tools) to facilitate the deployment and operation of web and network based applications. Cloud computing relies on sharing of resources to achieve coherence and economies of scale, similar to a utility (like the electricity grid) over a network.

Question 6:Write two characterstics of Wi-Fi.Answer:

It is wireless network.

It is for short range.

Question 7:Expand the following :

GSM

GPRS

Answer:

GSM – Global System for Mobile Communication.

GPRS – General Packet Radio Service.

Question 8:Which type of network out of LAN, PAN and MAN is formed, when you connect two mobiles using Bluetooth to transfer a videoAnswer:PAN

Question 9:Write one characterstic each for 2G and 3G mobile technologies.Answer:2G networks primarily involve the transmission of voice information while 3G technology provides the additional advantage of data transfer.

Question 10:What is the difference between Packet switching and circuit switching techniques ?Answer:In circuit switching, a dedicated path exists from source to destination while in packet switching, there is no fixed path.

Question 11:Write two advantages of using an optical fibre cable over an Ethernet cable to connect two service stations, which are 200 m away from each other.Answer:Advantages of optical fibre :

Faster speed than ethernet

Lower Attenuation

Question 12:Identify the Domain name and URL from the following :https://ift.tt/2Rc5dG8Answer:Domain name – income.inURL – https://ift.tt/2Rc5dG8

Question 13:Write one advantage of bus topology of network. Also illustrate how four (4) computers can be connected with each other using bus topology of network.Answer:Advantage (benefits) of Linear Bus Topology is that the cable length required for this topology is the least compared to the other networks.Bus Topology of Network:

Question 14:Give one suitable example of each URL and Domain Name.Answer:URL: http://waltons.inDomain Name: gmail.com

Question 15:Write one advantage of star topology of network ? Also, illustrate how five (5) computers can be connected with each other using star topology of network.Answer:Advantage (benefits) of star toplogy:Easy to replace, install or remove hosts or other devices.

Question 16:Identify the type of topology on the basis of the following :(a) Since every node is directly connected to the server, a large amount of cable is needed which increases the installation cost of the network.(b) It has a single common data path connecting all the nods.Answer:(a) Star Topology(b) Bus Topology

Question 17:Expand the following :(a) VOIP(b) SMTPAnswer:(a) Voice Over Internet Protocol(b) Simple Mail Transfer Protocol

Question 18:Daniel has to share the data among various computers of his two offices branches situated in the same city. Name the network (out of LAN, WAN, PAN and MAN) which is being formed in this process.Answer:MAN

Question 19:ABC International School is planning to connect • all computers, each spread over a distance of 50 metres. Suggest an economic cable type having high speed data transfer to connect these computers.Answer:Optical Fibre Cable.

Question 20:Mahesh wants to transfer data within a city at very high speed. Write the wired transmission medium and type of network.Answer:Wired transmission medium – Optical fibre cable Type of network – MAN.

Question 21:Which device is used to connect all computers inside a lab ?Answer:Hub or Switch

Question 22:Which device is used to connect all computers to the internet using telephone wire ?Answer:RJ – 45. It is an eight wired connectors used to connect computers on a LAN.

Question 23:What is Wi-Fi Card ?Answer:Wi-Fi cards are small and portable cards that allow the computer to connect to the internet through a wireless network. The transmission is through the use of radio waves.

Question 24:Explain the purpose of a router.Answer:A router establishes connection between two network and it can handle network with different protocols. Using a routing table, routers make sure that the data packets are travelling through the best possible paths to reach their destination.

Question 25:Identify the type of topology from the following.(a) Each node is connected with the help of a single cable(b) Each node is connected with the help of independent cable with central switching.Answer:(a) Bus topology(b) Star topology

Question 26:What is the difference between LAN and MAN ?Answer:LAN : It is Local Area Network. The diameter is not more than a single building.WAN : It is Metropolitan Area Network. LAN spans a few kms while MAN spans 5-50 km diameter and is larger than a WAN.

Short Answer Type Questions-I [2 marks each]

Question 1:Write any 1 advantage and 1 disadvantage of Bus topology.Answer:Advantage : Since there is a single common data path connecting all the nodes, the bus topology uses a very short cable length which considerably reduces the installation cost. Disadvantage : Fault detection and isolation is difficult. This is because control of the network is not centralized in any particular node. If a node is faulty on the bus, detection of fault may have to be performed at many points on the network. The faulty node has then to be rectified at that connection point.

Question 2:SunRise Pvt. Ltd. is setting up the network in the Ahmedabad. There are four departments named as MrktDept, FinDept, LegalDept, SalesDept.Distance between varioud buldings is as given:

MrktDept to FinDept80 mMrktDept to LegalDept180 mMrktDept to SalesDept100 mLegalDept to SalesDept150 mLegalDept to FinDept100 mFinDept to SalesDept50 m

Number of Computers in the buildings :

MrktDept20LegalDept10FinDept08SalesDept42

(i) Suggest a cable layout of connections between the Departments and specify the topology.Star Topology should be used.(ii) Suggest the most suitable building to place the server by giving suitable reason.Answer:As per 80 – 20 rule, server should be placed in MrktDept because it has maximium no. of computers.(iii) Suggest the placement of (i) modem (ii) Hub/ Switch in the network.Answer:Each building should have hub/switch and moderm in case Internet connection is required.(iv) The organization is planning to link its sale counter situated in various part of the same city, which type of network out of LAN, WAN, MAN will be formed ? Justify.Answer:MAN (Metropolitan Area Network) as MAN network can be carried out in a city network.

Question 3:Name the protocol(i) Used to transfer voice using packet switched network.Answer:VAns.VOIP (Voice Over Internet Protocol)(ii) Used for chatting between 2 group or between 2 individuals.Answer:IRC (Internet Relay Chat)

Question 4:What is an IP Address ?Answer:IP address is a unique identifier for a node or host connection on an IP network. An IP address is a 32 bit binary number usually represented as 4 decimal values, each representing 8 bits, in the range 0 to 255 (know as octets) separated by decimal points. This is known as “dotted decimal” notation.Example : 140.179.220.200

Question 5:What is HTTP ?Answer:HTTP is a protocol that is used for transferring hypertext (i.e., text,graphic,image,sound,video,e tc,) between 2 computers and is particularly used on the world wideWeb (WWW).[1 mark for definition/explanation]

Question 6:Explain the importance of Cookies.Answer:When the user browses a website, the web server sends a text file to the web browser. This small text file is a cookie. They are usually used to track the pages that we visit so that information can be customised for us for that visit.

Question 7:How is 4G different from 3G?Answer:3G technology adds multimedia facilities such as video, audio and graphics applications whereas 4G will provide better than TV quality images and video-links.

Question 8:Illustrate the layout for connecting 5 computersin a Bus and a Start topology of Networks.Answer:Bus topologyOr any valid illustration of Bus and Star Topology.

Question 9:What is a spam mail ?Answer:Spam is the abuse of electronic messaging systems (including most broadcast media, digital delivery systems) to send unsolicited bulk messages indiscriminately.

Question 10:Differentiate between FTP and HTTPAnswer:FTP is a protocol to transfer files over the InternetHTTP is a protocol which allows the use of HTML to browse web pages in the World Wide Web.

Question 11:Answer:following, which is the fastest

wired and

wireless medium of communication ?

Answer:

Wired – Optical Fiber

Wireless – Infrared OR Microwave

Question 12:What is Worm ? How is it removed ?Answer:A worm is a self-replicating computer program. It uses a network to send copies of itself to other computers on the network and it may do so without any user intervention.Most of .the common anti-virus (anti-worm) remove worm.

Question 13:Out of the following, which all comes under cyber crime ?(i) Stealing away a brand new computer from a showroom.(ii) Getting in someone’s social networking account without his consent and posting pictures on his behalf to harash him.(iii) Secretly copying files from server of a call center and selling it to the other organization.(iv) Viewing sites on a internet browser.Answer:(ii) & (iii)

Question 14:Perfect Edu Services Ltd. is an educational organization. It is planning to setup its India campus at Chennai with its head office at Delhi. The Chennai campus has 4 main buildings – ADMIN, ENGINEERING, BUSINESS and MEDIA. [O.D, 2015]You as a network expert have to suggest the best network related solutions for their problems raised in (i) to (iv), keeping in mind the distances between the buildings and other given parameters.Shortest distances between various buildings.

ADMIN To ENGINEERING55 mADMIN to BUSINESS90 mADMIN to MEDIA90 mENGINEERING to BUSINESS55 mENGINEERING to MEDIA90 mBUSINESS to MEDIA45 mDELHI Head Office to CHENNAI Campus2175 km

Number of Computers Installed at various buildings are as follows :

ADMIN110ENGINEERING75BUSINESS40MEDIA12DELHI Head Office20

(i) Suggest the most appropriate location of the server inside the Chennai campus (out of the 4 buildings), to get the best connectivity for maximum no. of computers. Justify your answer.Answer:ADMIN (Due to maximum number of computers)ORMedia (Due to shorter distance from the other buildings)(ii) Suggest and draw the cable layout to efficiently connect various buildings within the Chennai Campus for connecting the computers.Answer:Anyone of the following(iii) Which hardware device will you suggest to be procured by the company to be installed to protect and control the internet uses within the campus ?Answer:Firewall OR Router(iv) Which of the following will you suggest to establish the online face-to-face communication between the people in the Admin Office of Chennai Campus and Delhi Head Office ?Answer:Cable TV

Question 15:What kind of data gets stored in cookies and how is it useful ?Answer:When a Website with cookie capabilities is visited, its server sends certain information about the browser, which is stored in the hard drive as a text file. It is as way for the server to remember things about the visited sites.

Question 16:Differentiate between packet switching over message switching ?Answer:Packet Switching : Follow store and forward principle for fixed packets. Fixes an upper limit for packet size.Message Switching : Follows store and forward principle for complete message. No limit on block size.

Question 17:Out of the following, which is the fastest(i) wired and(ii) wireless medium of communication ?Infrared, Coaxial Cable, Ethernet Cable, Microwave, Optical FiberAnswer:(i) Wired : Optical Fiber(ii) Wireless : Infrared OR Microwave

Question 18:What is Trojan Horse ?Answer:A Trojan Horse is a code hidden in a program, that looks safe but has hidden side effects typically causing loss or theft of data, and possible system harm.

Question 19:Out of the following, which all comes under cyber crime ?

Stealing away a brand new hard disk from a showroom.

Getting in someone’s social networking account without his consent and posting on his behalf.

Secretly copying data from server of an organization and selling it to tire other organization.

Looking at online activities of a friends blog.

Answer:(ii) & (iii)

Question 20:Write any two differences between twisted pair and coaxial pair cable.Answer:

Twisted PairCo-axial CableTheir bandwidth is not as high as coaxial cables.It has high bandwidth.A twisted pair consists of two copper wires twisted around each other (each has its own insulation around it) like a double helix.A coaxial cable consists of a copper wire core covered by an insulating material and a layer of conducting material over that.

Question 21:Write one advantage of Bus Topology of network, also, illustrate how 4 computers can be connected with each other using star topology of network.Answer:Cable length required for his topology is the least compared to other networks.ORAny other correct advantage of Bus Topology of network.Illustration of 4 computers connected with each other using star topology of network.

Short Answer Type Question-II [3 marks]

Question 1:Uplifting Skills Hub India is a knowledge and skill community which has an aim to uplift the standard of knowledge and skills in the society. It is planning to setup its training centres in multiple towns and villages pan India with its head offices in the nearest cities. They have created a model of their network with a city, a town and 3 villages as follows.As a network consultant, you have to suggest the best network related solutions for their issues/problems raised in (i) to (iv) keeping in mind the distance between various locations and given parameters.Shortest distance between various location :

VILLAGE 1 to B_TOWN2 KMVILLAGE 2 to B_TOWN1.0 KMVILLAGE 3 to B_TOWN1.5 KMVILLAGE 1 to VILLAGE 23.5 KMVILLAGE 1 to VILLAGE 34.5 KMVILLAGE 2 to VILLAGE 32.5 KMA CITY Head Office to B HUB25 KM

Number of Computers installed at various locations are as follows :

B_TOWN120VILLAGE 115VILLAGE 210VILLAGE 315A_CITY OFFICE6

Note :

• In Villages, there are community centres, in which one room has been given as training center to this organization to install computers.• The organization has got financial support from the government and top IT companies.

Suggest the most appropriate location of the SERVER in the BHUB (out of the 4 locations), to get the best and effective connectivity. Justify your answer.

Suggest the best wired medium and draw the cable layout (location to location) to efficiently connect various locations within the B HUB.

Which hardware device will you suggest to connect all the computers within each location of B_HUB ?

Which service/protocol will be most helpful to conduct live interactions of Experts from Head Office and people at all locations of B HUB ?

Answer:(i) B-TOWN can house the server as it has the maximum no. of computers.(ii) Optical fibre cable is the best for this star topology.(iii) Switch(iv) VoIP

Long Answer Type Questions [4 marks each]

Question 1:Indian School in Mumbai is starting up the network between its different wings. There are Four Buildings named as SENIOR, JUNIOR, ADMIN and HOSTEL as shown below.:The distance between various buildings is as follows:

ADMIN TO SENIOR200mADMIN TO JUNIOR150mADMIN TO HOSTEL50mSENIOR TO JUNIOR250mSENIOR TO HOSTEL350mJUNIOR TO HOSTEL350m

Number of Computers in Each Building :

SENIOR130JUNIOR80ADMIN160HOSTEL50

(b1) Suggest the cable layout of connections between the buildings.(b2) Suggest the most suitable place (i.e., building) to house the server of this school, provide a suitable reason.(b3) Suggest the placement of the following devices with justification, i Repeater i Hub/Switch(b4) The organisation also has inquiry office in another dty about 50-60 km away in hilly region. Suggest the suitable transmission media to interconnect to school and inquiry office out of the following : i Fiber optic cable, i Microwave, i RadiowaveAnswer:(b1)

(b2) Server can be placed in the ADMIN building as it has the maxium number of computer.(b3) Repeater can be placed between ADMIN and SENIOR building as the distance is more than 110 m.(b4) Radiowaves can be used in hilly regions as they can travel through obstacles.

Question 2:Vidya Senior Secondary Public School in Nainital is setting up the network between its different wings. There are 4 wings named as SENIOR(S), JUNIOR(J), ADMIN(A) and HOSTEL(H).Distance between various wings are given below :

Wing A to Wing S100 mWing A to Wing J200 mWing A to Wing H400 mWing S to Wing J300 mWing S to Wing H100 mWing J to Wing H450 m

 WingNumber of Computers

Wing AWing SWing JWing H

201505025

(ii) Name the most suitable wing where the Server should be installed. Justify your answer.(iii) Suggest where all Hub(s)/Switch(es) should be placed in the network.(iv) Which communication medium would you suggest to connect this school with its main branch in Delhi ?Answer:(i) Star Topology

(ii) Server should be in Wing S as it has the maximum number of computers.(iii) All Wings need hub/switch as it has more than one computer.(iv) Since the distance is more, wireless transmission would be better. Radiowaves are reliable and can travel through obstacles

Question 3:Trine Tech Corporation (TTC) is a professional consultancy company. The company is planning to set up their new offices in India with its hub at Hyderabad. As a network adviser, you have to understand their requirement and suggest them the best available solutions. Their queries are mentioned as (i) to (iv) below.Physical Locations of the blocks of TTC

Block to Block distances (in Mtrs.)

Block (From)Block (To)DistanceHuman ResourceConference110Human ResourceFinance40ConferenceFinance80

Expected Number of Computers to be installed in each block

BlockComputersHuman ResourceFinanceConference2512090

What will be the most appropriate block, where TTC should plan to install their server?

Draw a block diagram showing cable layout to connect all the buildings in the most appropriate manner for efficient communication.

What will be the best possible connectivity out of the following, you will suggest to connect the new setup of offices in Bangalore with its London based office.• Satellite Link• Infrared• Ethernet Cable

Which of the following device will be suggested by you to connect each computer in each of the buildings?• Switch• Modem• Gateway

Answer:(i) Finance block because it has maximum number of computers.(ii)

(iii) Satellite link(iv) Switch

Question 4:Tech Up Corporation (TUC) is a professional consultancy company. The company is planning to set up their new offices in India with its hub at Hyderabad. As a network adviser, you have to understand their requirement and suggest them the best available solutions. Their queries are mentioned as (i) to (iv) below.Physical Locations of the blocks of TUC

Block to Block distances (in Mtrs.)

Block (From)Block (To)DistanceHuman ResourceConference60Human ResourceFinance120ConferenceFinance80

Expected Number of Computers to be installed in each block

BlockComputersHuman ResourceFinanceConference2512090

What will be the most appropriate block, where TUC should plan to install their server?

Draw a block to block cable layout to connect all the buildings in the most appropriate manner for efficient communication.

What will be the best possible connectivity out of the following you will suggest to connect the new setup of offices in Bangalore with its London based office?• Infrared• Satellite Link• Ethernet Cable

Which of the following devices will be suggested by you to connect each computer in each of the buildings?• Gateway• Switch• Modem

Answer:(i) Human resource block because it has maximum number of computers.(ii)(iii) Satellite link(iv) Switch

Question 5:G.R.K International Inc. is planning to connect its Bengaluru Office Setup with its Head Office in Delhi. The Bengaluru Office G.R.K. inter-national Inc. is spread across and area of approx. 1 square kilometer, consisting of 3 blocks – Human Resources, Academics and Administration.You as a network expert have to suggest answers to the four queries (i) to (iv) raised by them.Note : Keep the distance’ between blocks and no. of computers in each block in mind, while providing them the solutions.

Shortest distances between various blocks :

Human Resources to Administration100 mHuman Resources to Academics65 mAcademics to Administration110 mDelhi Head Office to Bengaluru Office Setup2350 km

Number of Computers installed at various blocks are as follows:

BLOCKNo. of ComputersHuman Resources155Administration20Academics100Delhi Head Office20

Suggest the most suitable block in the Bengaluru Office Setup, to host the server. Give a suitable reason with your suggestion.

Suggest the cable layout among the various blocks within the Bengaluru Office Setup for connecting the Blocks.

Suggest a suitable networking device to be installed in each of the blocks essentially required for connecting computers inside the blocks with fast and efficient connectivity.

Suggest the most suitable media to provide secure, fast and reliable data connectivity between Delhi Head Office and the Bengaluru Office Setup.

Answer:

(i) Human Resources because it has maximum number of computers.(ii)

(iii) Switch(iv) Satellite link

Question 6:Rovenza Communications International (RCI) is an online corporate training provider company for IT related courses. The company is setting up their new campus in Kolkata. You as a network expert have to study the physical locations of various blocks and the number of computers to be installed. In the planning phase, provide the best possible answers for the queries (i) to (iv) raised by them.Block to Block Distances (in Mtrs.)

FromToDistance

Administrative BlockAdministrative BlockFinance Block

Finance Block FacultyRecording Block FacultyRecording Block

6012070

Expected Computers to be installed in each block

BlockComputers

Administrative BlockFinance BlockFaculty Recording Block

3020100

Suggest the most appropriate block, where RCI should plan to install the server.

Suggest the most appropriate block to block cable layout to connect all three blocks for efficient communication.

Which type of network out of the following is formed by connecting the computers of these three blocks?• LAN• MAN• WAN

Which wireless channel out of the following should be opted by RCI to connect to students from all over the world?• Infrared• Microwave• Satellite

Write two advantages of using open source software over proprietary software.

Which of the following crime(s) does not come under cybercrime ?

Copying some important data from a computer without taking permission from the owner of-the data.

Stealing keyboard and mouse from a shop.

Getting into unknown person’s social networking account and start messaging on his behalf.

Answer:(i) Faculty Recording Block.(ii) Bus Topology(iii) LAN(iv) Satellite connection(v) Advantages of open source over proprietary software :• Open source software’s source code is available, can be modified copied & distributed while propritary software can’t be change.• Open source is free while propriatary is paid.(vi) (ii) Stealing keyboard & mouse from-a shop.

Question 7:(a) What is the difference between domain name and IP address?(b) Write two advantages of using an optical fibre cable over an Ethernet cable to connect two sendee stations, which are 190 m away from each other.(c) Expertia Professsional Global (EPG) is an online, corporate training provider company for IT related courses. The company is setting up their new campus in Mumbai. You as a network expert have to study the physical locations of various buildings and the number of computers to be installed. In the planning phase, provide the best possible answer for the queries (i) to (iv) raised by them.Building to Building Distances (in Mtrs.)

FromToDistance

Administrative BuildingAdministrative BuildingFinance Building

Finance BuildingRecording Studio BuildingFaculty Studio Building

6012070

Expected Computers to be installed in each Building:

BuildingComputers

Administrative BuildingFinance BuildingFaculty Studio Building

2040120

Suggest the most appropriate building, where EPG should plan to install the server.

Suggest the most appropriate building to building cable layout to connect all three buildings for efficient communication.

Which type of network out of the following is formed by connecting the computers of these three buildings?• LAN• MAN• WAN

Which wireless channel out of the following should be opted by EPG to connect to students of all over the world?• Infrared• Microwave• Satellite

Answer:(a) Domain Name is alphanumeric address of a resource over network IP address is a Numeric Address of a resoure in a Network. Example :Domain NameWWW.Gabsclasses.comIP Address102.112.0.153(b) Optical fibre Advantages :(i) Faculty Studio Building.(ii) Bus Topology.Faculty FinanceAdministrative BuildingStudio Building(iii) LAN(iv) Satellite

Question 8:To provide telemedicine faculty in a hilly state, a computer network is to be setup to connect hospitals in 6 small villages (VI, V2, …, V6) to the base hospital (H) in the state capital. This is shown in the following diagram.No village is more than 20 km away from the state capital.Imagine yourself as a computer consultant for this project and answer the following questions with justification :

Out of the following what kind of link should be provided to setup this network :

Microwave link,

Radio Link,

Wired Link ?

What kind of network will be formed; LAN, MAN, or WAN ?

Many times doctors at village hospital will have to consult senior doctors at the base hospital. For this purpose, how should they contact them: using email, sms, telephone, or video conference ?

Out of SMTP and POP3 which protocol is used to receive emails ?

What are cookies in the context of computer networks?

Rajeshwari is trying for on-line subscription to a magazine. For this she has filled in a form on the magazine’s web site. When the clicks submit button she gets a message that she has left e-mail field empty and she must fill it. For such checking which type of script is generally executed; client side script or server-side script ?

Mention any one difference between free-ware and free software.

Answer:(i) Radio Link(ii) MAN(iii) e-mail(iv) POP3(v) Cookies are files that store user information that is used to identify the user when he logs into the system.(vi) Server-side script.(vii) Freeware is a software that has the user to get unlimited usage. Free software may be free for a certain period’only.

Question 9:Work a lot Consultants are setting up a secured network for their office campus at Gurgaon for their day-to-day office and web- based activities. They are planning to have connectivity between three buildings and the head office situated in Mumbai. Answer the questions (i) to (iv) after going through the building positions in the campus and other details, which are given below:Distances between various buildings :

Building “GREEN” to Building “RED”110 mBuilding “GREEN” to Building “BLUE”45 mBuilding “BLUE” to Building “RED”65 mGurgaon Campus to Head Office1760 km

Number of computers

Building “GREEN”32Building “RED”150Building “BLUE”45Head Office10

Suggest the most suitable place (i.e., building) to house the server of this organization. Also give a reason to justify your suggested location.

Suggest a cable layout of connections between the buildings inside the campus.

Suggest the placement of the following devices with justification:

Repeater.

Switch.

The organization is planning to provide a high speed link with its head office situated in Mumbai using a wired connection. Which of the following cables will be most suitable for this job ?

Optical Fibre

Coaxial Cable

Ethernet Cable

Answer:(i) The most suitable place to install server is building “RED” because this building has maximum computer which reduce communication delay.(ii) Cable layout is Bus topology(iii) Since the cabling distance between buildings GREEN, BLUE and RED are quite large, so a repeater, would ideally be needed along their path to avoid loss of signals during the course of data flow in there routes.(2) In the layout a switch each would be needed in all the building, to interconnect the group of cables from the different computers in each building.(iv) Optical fibre.

Question 10:Granuda Consultants are setting up a secured network for their office campus at Faridabad for their day to day office and web based activities. They are planning to have connectivity between 3 building and the head office situated in Kolkata. Answer the questions (i) to (iv) after going through the building positions in the campus and other details, which are given below :Distances between various buildings :

Building “RAVI” to Building “JAMUNA”120 mBuilding “RAVI” to Building “GANGA”50 mBuilding “GANGA” to Building “JAMUNA”65 mFaridabad Campus to Head Office1460 km

Number of computers

Building “RAVI”25Building “JAMUNA”150Building “GANGA”51Head Office10

Suggest the most suitable place (i.e., block) to house the server of this organization. Also give a reason to justify your suggested location.

Suggest a cable layout of connections between the buildings inside the campus.

Suggest the placement of the following devices with justification:

Repeater

Switch

The organization is planning to provide a high speed link with its head office situated in the KOLKATA using a wired connection. Which of the following cable will be most suitable for this job ?

Optical Fibre

Coaxial Cable

Ethernet Cable

Answer:(i) The most suitable place to install server is in building “JAMUNA” because this building has maximum computer which reduce the communication delay.(ii) Cable layout. (Bus topology).(iii) (1) Since the cabling distance between buildings RAVI, GANGA and JAMUNA are quite large, so a repeater, would ideally be needed along their path to avoid loss of signals during the course of data flow in these routes.(2) In the layout a switch would be needed in all the building, to interconnect the group of cables from the different computers in each building.(iv) Optical fibre.

Question 11:Rehaana Medicos Center has set up its new center in Dubai. It has four buildings as shown in the diagram given below :Distances between various buildings are as follows:

Accounts to Research Lab55 mAccounts to Store150 mStore to Packaging Unit160 mPackaging Unit to Research Lab60 mAccounts to Packaging Unit125 mStore to Research Lab180 m

Number of computers

Accounts25Research Lab100Store15Packaging Unit60

As a network expert, provide the best possible answer for the following queries :

Suggest a cable layout of connections between the buildings.

Suggest the most suitable place (i.e. buildings) to house the server of this origanization.

Suggest the placement of the following device with justification :(a) Repeater(b) Switch/Hub

Suggest a system (hardware/sofware) to prevent unauthorized access to or from the network.

Answer:(i) Layout 1(ii) The most suitable place/building to house the server of this organization would be in Research Lab, building as this building contains the maximum number of computers.(iii) (a) For layout I, since the cabling distance between Accounts to Store is quite large, so a repeater would ideally be needed along their path to avoid loss of signals during the course of data flow in this route. For layotat2, since the cabling distance between Store to Research Lab is quite large, so a repeater would ideally be placed.(b) In both the layouts, a Flub/Switch each would be needed in all the buildings to interconnect the group of cables from the different computers in each building.(iv) Firewall

Question 12:Who is a hacker ?Answer:A computer enthusiast, who uses his computer . programming skills to intentionally access a computer without authorization is known as hacker. A hacker accesses the computer without the intention of destorying data or maliciously harming the computer.

Question 13:The following is a 32 bit binary number usually represented as 4 decimal values, each representing 8 bits, in the range 0 to 255 (know as octets) separated by decimal points. 140.179.220.200What is it? What is its importance?Answer:It is an IP Address. It is used to identify the computers on a network.

TOPIC-2Network Security and Web Service

Very Short Answer Type Questions [1 mark each]

Question 1:Define firewall.Answer:A system designed to prevent unauthorized access to or from a private network is called firewall. It can be implemented in both hardware and software or combination of both.

Question 2:Write any two examples of Server side Scripts.Answer:

ASP

PHP

Question 3:What is the difference between E-mail & chat?Answer:

Chat occurs in near real time, while E-mail doesn’t.

Chat is a 2-way communication which require the permission of both parties, while E-mail is a 1-way communication.

Question 4:Write names of any two popular open source software, which are used as operating systems.Answer:

Kernels

Unix

Linux

Question 5:What is the difference between video conferencing and chat.Answer:In conference, we can include more than one person and it allows text, video and audio while chat is one-to-one communication.

Question 6:Expand the following abbreviations :

HTTP

VOIP

Answer:

HTTP-Hyper Text Transfer Protocol.

VOIP-Voice Over Internet Protocol.

Question 7:What is the difference between HTTP and FTP?Answer:Hyper Text Transfer Protocol deals with Transfer of Text and Multimedia content over internet while FTP (File Transfer Protocol) deals with transfer of files over the internet.

Question 8:What out of the following, will you use to have an audio-visual chat with an expert sitting in a far-away place to fix-up a technical issue ?

VOIP

Email

FTP

Answer:(i) VOIP

Question 9:Name one server side scripting language and one client side scripting language.Answer:Client Side :

JAVASCRIPT

VBSCRIPT

Server Side :

ASP

JSP

Question 10:Which out of the following comes under cyber crime ?

Operating someone’s internet banking account, without his knowledge.

Stealing a keyboard from someone’s computer.

Working on someone’s Computer with his/ her permission.

Answer:(i) Operating someone’s internet banking account, without his knowledge.

Question 11:Name two proprietary softwares along with their application.Answer:

MS-Office – All office applications MS-Word, MS-Excel, MS-PowerPoint.

Visual Studio – Visual Basic, Visual C+ + softwares for application development.

Question 12:Name some cyber offences under the IT Act.Answer:

Tampering with computer source documents

Hacking.

Publishing of information which is obscene in electronic form.

Question 13:What are the 3 ways of protecting intellectual property ?Answer:

Patents

Copyrights

Trademark

Question 14:When a user browses a website, the web server sends a text file to the web browser. What is the name of this ?Answer:Cookies.

Short Answer Type Questions – I [2 mark each]

Question 1:Define the following :

Firewall

VoIP

Answer:(i) Firewall : A system designed to prevent unauthorized access to or from a private network is called firewall. It can be implemented in both hardware and software or combination of both.(ii) VoIP : Voice -over-Internet Protocol(VoIP) is a methodology and group of technologies for delivering voice communications and multimedia sessions over Internet Protocol(IP) networks, such as the Internet.

Question 2:Give the full form of the following terms.

XML

FLOSS

HTTP

FTP

Answer:

XML: Extensible Markup Language.

FLOSS: Free-Libre Open Source Software.

HTTP: Hyper Text Transfer Protocol.

FTP: File Transfer Protocol.

Question 3:Differentiate between WORM and VIRUS in Computer terminology.Answer:VIRUS directly effects the system by corrupting the useful data. A computer virus attaches itself to a program or file enabling it to spread from one computer to another.A worm is similar to a virus by design and is considered to be sub class of a virus. Worm spread from computer to computer, but unlike a virus, it has the capability to travel without any human action.

Abbrevations :Question 4:Expand the following

GSM

GPRS.

Answer:

GSM : Global System for Mobile Communication.

GPRS : General Packet Radio Service.

Question 5:Expand the following abbreviations :

HTTP

VOIP

Answer:

HTTP : Hyper Text Transfer Protocol.

VOIP : Voice Over Internet Protocol.

Question 6:Give the full form of :

FOSS

HTTP

Answer:

FOSS : Free Open Source Software.

HTTP : Hyper Text Transfer Protocol.

Question 7:Write the full forms of the following :

GNU

XML

Answer:

GNU : GNU’s Not Unix

XML : Extensible Markup Language.

Question 8:Expand the following terminologies :

GSM

WLL

Answer:

GSM : Global System for Mobile Communication

WLL : Wireless Local Loop.

Question 9:Give the full forms of the following terms :

CDMA

TDMA

FDMA

Answer:

CDMA : Code Division Multiple Access

TDMA : Time Division Multiple Access

FDMA : Frequency Division Multiple Access

Question 10:Expand the following abbreviations :

FTP

TCP

SMTP

VOIP

Answer:

FTP : File Transfer Protocol

TCP : Transmission Control Protocol.

SMTP : Simple Mail Transfer Protocol.

VOIP : Voice Over Internet Protocol.

Short Answer Type Questions-II [3 marks each]

Question 1:Give two examples of PAN and LAN type of networks.Answer:

PANLAN(i) Personal Area Network(ii) Spans a few metersExample :Bluetooth using 2 moblies and laptops sharing files.(i) Local Area Network(ii) Spans upto a km.Example :System in a lab in a school, systems at home.

Question 2:Which protocol helps us to browse through web pages using internet browsers ? Name any one internet browser.Answer:HTTPGoogle Chrome is a browser

Question 3:Write two advantages of 4G over 3G Mobile Telecommunication Technologies in terms of speed and services.Answer:4G has very high data rates upto 100 Mbps.It covers a wider lange than 3G

Question 1:Write two characteristics of Web 2.0Answer:Web 2.0

dynamic and interactive websites

Only the changed part is reloaded so faster.

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