LearnNetwork
Modules

OSI and TCP/IP layers

The 7-layer OSI model, the 4-layer TCP/IP model, and how they line up with real protocols.

  1. 1.The OSI model — seven layers, one mental model

    12 min · Take the quiz

  2. 2.TCP/IP — the four-layer model that actually runs the internet

    8 min · Take the quiz

  3. 3.Encapsulation — headers all the way down

    8 min · Take the quiz

  4. 4.TCP vs UDP — when to use which

    9 min · Take the quiz