"Computer Networking: A Top-down Approach" by Jim Kurose & Keith W. Ross (8th edition)
A Partial (and Informal!) Summary of Chapters 3, 4, and 5
Ali Khaleqi Yekta - Jun 2023
Sockets are in App layer. When they reach Transport layer, it merges (multiplexes) all of them & adds its own header (headers are responsible to find the correct socket).