🔥 TIL: Networking Basics

Published on February 10, 2020


I had a conversation with a friend about their architectural structure on his work, and he mentioned the word websocket. I believe I have encoutered this word many times and I used it on one of my projects but still I don't have the full grasp idea of what is it doing.


Reference to https://dev.to/iwilsonq/build-real-time-apps-by-learning-websockets-3c9m


Socket - A TCP (Transmission Control Protocol) Socket is and endpint instance defined by the combination of IP address with a port, in the context of either a listening state (a server) or a particular TCP Connection (a client, like your browser).


TCP Connection - pairing of two sockets.


3 main kinds of transports commonly use in browser web apps


In most tutorials that deal with external data, you'll deal with the left-most paradigm's HTTP requests. Actually, all of these flows are initiated with an HTTP request, as shown by the blue arrows.

I don't commonly see articles or tutorials on SSE, but MDN has a good reference in case a one-way data stream sounds intriguing.

The third flow is most interesting to us - it gives us the ability to communicate with the server over a single long-lived connection.


Use Cases for websockets

  1. Social feeds
  2. Multiplayer Games
  3. Collaborative Editing/Coding
  4. Multimedia Chat