#network programming

[myshunosun]

#EAPartner Getting art school flashbacks from the Artist Studio Kit. Not sure if that's a good thing or not, but I do enjoy some cute art-themed clutter. Thanks to the EA Creator Network for providing me with a copy of this kit!

[republicansaredomesticterrorists]

They are hosting training sessions to teach right-wing judges how to bend the law in favor of the oligarchs and their Republican puppets.

“Billionaire-bankrolled judicial trips are nothing new on the right. In 2021 and 2022, an investigation by The Lever found just two conservative organizations, George Mason University and the Federalist Society, paid to send more than 100 federal judges on a total of 251 educational retreats.”

[hungwy]

i have no computer goals. i dont have any computer wants or needs. im likea computer buddhist. this is my main barrier to coding

[morethanonepage]

i wish people would at least acknowledge that the reason tv shows used to have 20+ episodes per season was bc networks wanted to sell commercial slots over 20+ weeks, not for like. love of the game character development or w/e

[gabaghoul-fandom-meme-queen]

I got high and watched "Lazarus Rising".

Part Two

[incorrect-rockman-exe-quotes]

[codingquill]

Network switches

What’s a network switch ?

A switch is a device used in computer networks to connect multiple devices together within a single local area network (LAN). Its main role is to facilitate communication between different connected devices, such as computers, printers, servers, IP phones, etc.

It is a mini-computer which is made up of RAM, ROM, flash RAM, NVRAM, a microprocessor, connectivity ports and even an operating system.

RAM

RAM (Random Access Memory) contains the current configuration of the switch and temporarily stores the MAC address table, which is then processed by the microprocessor.

Microprocessor

The microprocessor is the heart of the switch, responsible for data processing, including switching and creating links between multiple devices.

External memories

External memories, such as flash RAM, ROM, and NVRAM (Non-Volatile RAM), store configuration files , different versions of the IOS , etc ...

Ports

The switch ports are the communication interfaces of the switch. There are several of them, generally 24 for a Cisco switch. Each port is associated with an LED which indicates its status and activity.

How does it work ?

Now how does a switch work to transfer information from one machine to another?

Suppose we have 4 machines: A, B, C and D connected to our switch in ports 1, 2, 3 and 4 as follows:

The switch only works with MAC addresses , so basically we have an empty MAC address table stored in RAM as soon as the switch starts up which looks like this : 

Transmitting data from machine A to machine B happens in the following steps:

Machine A sends a frame to machine B

Once this frame arrives at port 1 (which is the one linked to A), the switch reads the source MAC address and stores it in the MAC address table

The switch reads the destination MAC address and looks for it in the table, if it is not in the table, it broadcasts to all the active machines connected to the switch except the source one.

If the port linked to the machine we want is active, it sends a response frame from which the switch reads the MAC address we were looking for (@B)

Once done, it records the MAC address of B in the table.

This process repeats until the switch reaches what is called "MAC address table stability", that is to say it knows all the MAC addresses of the connected machines and has no more need to broadcast.

Starting and configuring a switch

When it comes to booting a switch, the process is similar to that of a traditional computer system:

POST (Power-On Self Test): The switch performs proper functioning tests on all hardware.

Loading IOS (Internetwork Operating System): The switch operating system is loaded.

Loading the configuration. At this stage we have two cases:

Either the switch already has a startup configuration defined and stored in NVRAM

Either the switch is blank and it is up to us to define the startup configuration when it goes to setup mode

Switch configuration

The configuration of a switch is done through different modes, such as user mode, privileged mode and global configuration mode, which allows access to specific configuration modes, such as interface mode, routing mode, line mode, etc.

And to do all this of course you must first connect the switch with the machine via the console cable and open a terminal emulator

💡 It should be noted that the only machine that can configure the switch is the one connected to it by a console cable, the others are only hosts.

[therentyoupay]

Hello, Kris! I think I might’ve already gotten the gist of it, but it’s been some time. What exactly IS Academia Mode? Are you still in school, or is this your actual job, and it just happens to be involved in the education system?

Many thanks!

hahah no worries!!! that is a good question 🤣😭😭🙏 for me, academia mode is currently finishing the 5th and final year of my doctoral program and includes (but is not limited to lol):

data collection, analysis, write-ups

writing python programs to support my data cleaning, data coding, stats, and data analysis/visualizations

applying for GRANT MONEYYYY

submitting abstract proposals to conferences (and applying for MORE GRANT MONEYYYY)

reporting research findings (writing journal article manuscripts, preparing conference slides)

writing my actual dissertation manuscript lol

supporting and instructing my research assistants

sharing my research with mainstream public audiences

writing my non-fiction book based on my ongoing dissertation research

teaching classes, grading papers, holding office hours, fielding emails, writing letters of recommendation for all sorts of students' fellowships/grad admissions/grant applications, teaching students how to strategize their personal statements, grant purpose letters, and other aspects of apps, etc.

peer-reviewing others' journal manuscripts, providing feedback to colleagues (blind review or not)

assisting with my advisor's research and textbook manuscripts (proofreading, copy-editing, internet sleuthing, finding more up-to-date citations, occasionally writing rough drafts)

writing chapters for edited volumes on various topics

READING. all the time. reading new literature and research articles constantly. ALL THE TIME. writing 1-pagers and mini-annotated bibs for future lit review use, etc.

WRITING. all the time. professional-speak, academic-speak, insructor-speak.

getting paid to travel to conferences to present my research (GRANT MONEYYYYYY)

by may 2025, i'll be a Ph.D.!!!!!! [screams]

academia mode! ✨🤣🤣🤣😭🤣💕 every day, i think about how lucky i am that i get paid to do what i do 🥹🥹🥹🥹🥹 hope you are having a magnificent day, and thank you for the ask!!

[sailormoonsub]

what was it that Grace said? if you don't like something throw it under the wheel? well I don't like the reductionist worldview you're peddling buddy

[asterlark]

i was so so brave today and guess what. i have to keep on being so so brave tomorrow. i don't even get to have a 72 hour rest and treat time lockdown to celebrate and recover from how brave i was. being an alive human continues to test me in devious and tortuous ways the devil himself could only dream of

[sminny-wew]

I've always been Team NetIris but ever since my friends made me aware of Saito x Meiru it feels like my third eye's been opened (feat. @dunedragon's Saito design)

Also golly gee I wonder why the text is those colors.....Hmmmm 💚🤍🩶🖤

🔫 GO LISTEN TO THE HIT SONG "A HUMAN'S TOUCH" BY TWRP AND MCKENNA RAE ON YOUTUBE OR SPOTIFY I DON'T CARE JUST DO IT 🔫

[petpetpinixy]

web tumblr keeps functioning less and less and idk if it's normal tumblr brokenness or some weird attempt at trying to stop me from using an adblocker. if it's the latter it's not gonna work i have a pi hole

[gabaghoul-fandom-meme-queen]

I got high and watched "Lazarus Rising".

Usually my friends and I get high and watch romance shows and yell at the TV but tonight I was alone so I snapped everyone. 🤦‍♀️ so here are my thoughts...

[d0nutzgg]

Tonight I am hunting down venomous and nonvenomous snake pictures that are under the creative commons of specific breeds in order to create one of the most advanced, in depth datasets of different venomous and nonvenomous snakes as well as a test set that will include snakes from both sides of all species. I love snakes a lot and really, all reptiles. It is definitely tedious work, as I have to make sure each picture is cleared before I can use it (ethically), but I am making a lot of progress! I have species such as the King Cobra, Inland Taipan, and Eyelash Pit Viper among just a few! Wikimedia Commons has been a huge help!

I'm super excited.

Hope your nights are going good. I am still not feeling good but jamming + virtual snake hunting is keeping me busy!

[darkpitlesbian]

bedman.EXE

i love giving him bed traits 👍

[sentient-rift]

(Suddenly, Thanos snaps his fingers and wipes out half the universe.)

"Oh, not again..."

"Seriously?! We're doing this again?!"

"Curse you, Thanos!!"

"Not on my watch! The Infinity Stones won't work here!"

(RiFT snaps his own fingers and reverses the effect.)

"WAAAAAAH!! THANK YOU, RiFT!!! I REALLY HATE THAT MEME!!!"

"Of course. No meme is going to take my friends away from me."