Can anyone help deal with the most common types of connections. In particular with persistent compounds.
By the word "help" I mean references to sources with a good , comprehensible display of information, no matter in what form.
Simple examples can be with comments.

And yes, I googled. But he could not find a good and clear material. Thanks to everyone who tells!

  • 2
    Maybe you just need to translate this word and everything will become clear? A persistent connection is a persistent connection, when both the server and the client can send / receive data at any time. This is usually TCP and what is based on it. But not everything :) HTTP - although it is based, but usually it is not persistent. - KoVadim
  • And what exactly are we talking about, in the sense, at some OSI level, do you study these connections or even something specific and applied, related to a sql server or apache , for example? - approximatenumber
  • tcp, http. I try to write the simplest echo-server in python. - Denis Oleshchenko

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