#networking program

[fleabagdiaz]

feeling so very normal about tvshow. as always.

[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!

[bloodsoakedbuckley]

"you wanna do a rope rescue? 🙄 of course you do." is bad enough on its own. sickening. get married. but then bobby hits you with: "well, he's not doing it alone. he's gonna need you on the pulley."

and like. thesis statement. thesis statement. im out of my mind about it. buck is gonna do the reckless thing and eddie is gonna be there having his back. partners. forever. its SICK

[jaronofthebored]

feels like a good time to show off some miis I've made in miitopia (mostly deltarune with some ghost trick)

[spac3ducky]

re-downloaded Tux Paint ... Dexter says hi !     

[soapdispensersalesman]

[carldoonan]

These Digital Li’l Denizens say: “01001000 01101111 01110111 01100100 01111001 00101100 00100000 01101110 01100101 01110010 01100100 00101110” 💾👾💻

[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

[lxde-official]

hey i need some help

I'm developing a video compression algorithm and I'm trying to figure out how to encode it in a way that actually looks good.

basically, each frame is made up of a grid of 5x8 pixel tiles, each cell being one of 16 tiles. 8 of these tiles can be anything, while the other 8 are hard-coded.

so far, my algorithm simply compares each tile of the input frame to each hard-coded tile, and the 8 tiles that match the least are set to the "custom" tiles, and the other ones that match the hard-coded ones more are set to those hard-coded ones.

this works okay, but doesn't account for if two input frame tiles are the same thing or similar, it would be better to re-use custom tiles (eg, if the whole screen is black — due to the limitations of the screen I'm using, a solid black tile must be a custom tile, but a solid white one can be hard coded).

speed isn't that important, as each frame is only 80x16 pixels at the most, with one bit per pixel, and each tile is 5x8 pixels, for a grid of 16x2 tiles.

TL;DR: I need help writing an algorithm that can arrange 16 tiles into a 16x2 grid, while also determining the best pattern to set 8 of those tiles to, while leaving the other 8 constant.

[shastooned]

madness.

[tcw-incorrect-quotes]

Fox: What the kriff.  Fox: IPESPN is showing the galactic jump rope championship.  Fox: Who the hell watches jump rope competiti- ooh, bouncy.

[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.

[projectcatzo]

Diners Drive-ins and Dives is the live laugh love of Food Network