#OSI Model

[ripfunkyboy]

Dante's Inferno but it's the 7 layers of the OSI model

[infosectrain03]

The Data Link Layer is the second layer of the Open Systems Interconnection (OSI) model, which serves as a conceptual framework that standardizes communication system functions. This layer focuses on the reliable transfer of data between adjacent network nodes over a physical link.

[techgabbing]

Explore the Seven Layers of Connectivity in the OSI Model

Unlock the mysteries of the OSI Model! Beginner-friendly guide to understand the layers and functions. Dive into networking fundamentals effortlessly.

[sugoiney-weaver]

Every friend group needs a Router. Someone who can go Layer 3 and talk to other groups. A diplomat. An envoy. A bard.

[networkkingsindia]

CCNP ENCOR Course with Networking Fundamentals for Aspiring Network Engineers

In the fast-paced world of networking, staying updated with the latest technologies and certifications is crucial for career growth. The CCNP encor course, combined with solid networking fundamentals, offers a compelling pathway for aspiring network engineers aiming to build a strong foundation and advance their expertise. This course prepares candidates for the Cisco Certified Network Professional Enterprise Core (CCNP ENCOR) exam and equips them with essential knowledge and skills needed in today’s enterprise networking environments.

[certexamscom]

OSI model Application Layer of the opensystems model explained in this video.

[minhphong306]

Tìm hiểu mô hình OSI cùng Hằng béo

— Hằng này, anh đố mày, mô hình OSI là gì? — Em nhớ mang máng nó là mô hình bảy tầng gì đó… Mà học cái này có bao giờ dùng đến đâu, nên em chả nhớ được. — Uh, khi mới làm thì có thể em chưa dùng thật, nhưng khi làm lên cao hơn thì em có thể phải dùng tới nó đó. — Thôi thôi, anh đừng có mà mồm điêu. Đi làm mấy năm có bao giờ em dùng đâu? Kể ra ứng dụng xem nào? Continue reading Untitled

[noob2networking]

Server Saturday: Understanding ARP - How Devices Communicate on a Local Network

If you’ve ever wondered how devices communicate on a local network, ARP is the answer. ARP, or Address Resolution Protocol, is a key component of networking that allows devices to communicate with each other using unique MAC addresses. In this post, we’ll dive into the details of ARP, how it works, and how it helps to facilitate communication between devices on a local network. We’ll also cover…

[carnivorousarcher]

experimenting with 3D modeling and i made this poseable minecraft skin-esque figure :) will keep experimenting with better joints and poseability but if anyones interested i’d gladly share the model

more info under cut!

this is very much inspired by the original bendable papercraft figure, i basically used the same mechanism for the joints just made them on a 3D model. the back of the head is glued on seperately since this was printed in one piece and it needed to be flat

it was printed with clear filament on a PRUSA MK4S printer :3

this one is smaller than the original papercraft bendable figure but i’m planning to make it exact on the next version :) (the mat theyre standing on has a 1cm grid)

trying to make it as poseable as i can without losing the block figure so it can still be made into minecraft skins

[hug-your-face]

The Next Web Needs To Be A Forest

Been mourning the '90s and '00's internet for a while. Been hating the enshittified, platform-capitalistic internet dystopia.

Been saying for a while that the next internet must get away from centralized control, and be founded on distribution and federation.

There is no single monolithic "TCP/IP server farm" run by one company with one mentally-diseased white man at the helm. This is why internet traffic can get more or less anywhere. But there ARE monolithic social media sites (Twitter/X, FB). And there is monolithic identity management ("log in to BuyJunk with your Google account"). Even Discord where anyone can make their own "server" is hosted and runs on Discord-proprietary software and hardware.

The next internet -- if it's to be any good and not just further enshittification -- is going to be less like the hub-and-spoke system of airports, and more like a forest where trees and clusters of trees interconnect with each other organically.

Group chats, where some members of the group chat are members of multiple group chats.

But the only way that internet is going to happen is if people -- not corporations -- make it. There's no profit in a distributed internet. It's going to have to happen for the same reason that people throw parties, or stage demonstrations, or just get together regularly to go climb rocks.

It's going to have to happen out of love.

And that means that the gap between WANTING to build this new net and BEING ABLE to build this new net needs to get a lot smaller.

Keep an eye out for technologies, organizations, and education that narrows the gap. Help them.

And beware legislation and corporations that want to put barriers in the way. Fight them.

[infosectrain03]

The OSI model provides a standardized framework for the interaction and communication between various networking protocols and technologies within a network. It breaks down the communication process into seven distinct layers, each with specific responsibilities, and ensures that data communication between devices is seamless and uniform. One significant layer in the OSI model is the Presentation Layer.

[techgabbing]

Understanding the OSI Model: A Layer-by-Layer Guide

Explore each layer of the OSI Model in detail. Understand how they work together to ensure seamless network communication.

[1o1percentmilk]

guess who's paying for not paying attention to the networks unit in systems programming last spring

[akrnd085]

Starting with Go Development: Setting Up, Writing Your First Program, and Tools

What is OSI Model? In the vast world of computer networking, 7 layers of OSI model is like a blueprint that helps to understand how different parts of a network work together. OSI stands for Open Systems Interconnection. The OSI model, established by ISO (International Organization for Standardization) in 1984, acts as a guide for understanding how computers share data.

The 7 Layers of OSI It consists of seven layers collaborating to perform specific network tasks, providing a structured way to approach networking.

1. Physical Layer

2. Data Link Layer

3. Network Layer

4. Transport Layer

5. Session Layer

6. Presentation Layer

7. Application Layer

Comprising seven layers, the 7 layers of OSI model provides a structured approach to understanding and implementing network protocols. Let’s explore each layer to understand the basics of this concept :

1. Physical Layer: The Physical Layer, at the bottom of the OSI model, handles the actual sending and receiving of raw binary data over physical connections. It deals with cables, connectors, and signal modulation, forming the essential infrastructure of any network.

Key features: • Responsible for the physical transmission of data using cables, switches, or routers.

• Ensures synchronization of data bits and sets the speed of data transmission.

• Converts data into signals for transmission and arranges the layout of network devices.

2. Data Link Layer: Moving up, the Data Link Layer focuses on creating dependable links between directly connected devices. It manages addressing schemes, error detection, and flow control mechanisms. Ethernet and MAC (Media Access Control) addresses play a crucial role, ensuring effective communication within the same network.

Key features: • Manages the transmission of data frames across the network.

• Detects and addresses damaged or lost frames, initiating retransmission when needed.

• Divides data into smaller units called frames and updates frame headers with sender and receiver MAC addresses.

3. Network Layer: The Network Layer introduces the concept of logical addressing, often in the form of IP addresses. Its primary role is to route data packets between different networks. Routers, operating at this layer, make decisions based on logical addresses to ensure packets reach their intended destination across interconnected networks.

Key features: • Uses logical addressing to route packets between different networks.

• Introduces IP addresses, allowing communication across diverse networks.

• Utilizes routing protocols to determine the best paths for data transmission.

• Employs ICMP for error reporting and diagnostics, improving network reliability.

4. Transport Layer: Responsible for end-to-end communication, the Transport Layer manages data flow between devices, ensuring reliable and error-free delivery. TCP and UDP are protocols that provide different ways of transmitting data depending on the requirements of the application.

Key features: • Ensures seamless communication from end to end, managing flow control and error correction.

• Segments data for efficient transmission across the network.

• Implements protocols like TCP for reliable, connection-oriented communication.

• Provides UDP for faster, connectionless communication suitable for real-time applications.

5. Session Layer: The Session Layer facilitates communication sessions between applications on different devices. It manages session setup, maintenance, and termination to ensure secure and reliable communication between applications.

Key features: • Manages the establishment, maintenance, and termination of sessions between applications.

• Creates synchronization points in data exchange and facilitates the reestablishment of disrupted sessions.

6. Presentation Layer : Focusing on data translation and encryption, the Presentation Layer ensures that information is sent and received in a format that applications can understand. It deals with data compression, encryption, and format conversions, ensuring seamless communication between diverse systems.

Key features: • Translates data formats for compatibility between different systems.

• Handles encryption, compression, and formatting to optimize data exchange.

• Standardizes data representation, ensuring smooth communication.

7. Application Layer: At the top of the OSI model is the Application Layer, acting as the interface between the user and the network. It has applications that are aware of networks and offers services like email, file transfer, and remote login. Protocols like HTTP, SMTP, and FTP operate here, enabling diverse applications to communicate over the network.

Key features: • Represents the user interface and provides network services.

• Acts as the entry point for application-specific communication.

• Facilitates various network services (e.g., HTTP, SMTP, FTP) and supports diverse applications and user interact.

Features of OSI Model The OSI model serves as a powerful tool for understanding, designing,a nd troubleshooting computer networks. It feature contribute to a comprehensive view of network communication.

• Holistic View of Communication: One of the standout features is its ability to provide a holistic view of communication over a network. The seven-layered structure helps professionals understand the process from raw data transmission to user interaction.

• Hardware and Software Collaboration: The model explains how hardware and software work together in a network. The OSI model demonstrates the collaboration of different elements, from the Physical Layer to the Application Layer.

• Adaptability to Emerging Technologies: As technology evolves, the OSI model remains relevant. Its design allows professionals to easily incorporate new technologies into existing network systems.

• Efficient Troubleshooting: Troubleshooting is simplified through the OSI model’s layered approach. By isolating functions within each layer, professionals can identify and resolve issues more efficiently, ensuring the reliability and optimal performance of networked systems.

Conclusion The 7 layers of the OSI model are useful for designing and troubleshooting networks. Each layer has a specific job, making data transmission efficient and reliable. Additionally, the Subnetting Process is crucial for optimizing network performance and managing IP addresses efficiently. The OSI model, along with subnetting, continues to be a valuable guide for networking professionals as technology advances.