Edexcel 1CP2 4.1.7: The 4-layer TCP/IP model
The free BugBot lesson that teach this point, a robot to try it on, and the past-paper questions that test it.
What it covers
Networking is a big problem, so it is split into layers. Each layer does one job, uses the layer below it, and provides a service to the layer above. The web browser does not need to know whether your data goes by Wi-Fi or cable; the Wi-Fi does not need to know it is carrying a web page. This lesson describes the TCP/IP model and shows data being wrapped and unwrapped as it goes down and up the layers.
- The TCP/IP model
- Down one side, up the other
- Why layers?
Or do it in the simulator, with tasks that mark themselves
Lessons that teach it
- F10.8 Layers Networks
The four-layer TCP/IP model, encapsulation, and why layers are used.
Try it on a robot
The task from F10.8 Layers, running here. Change the program and press Run.
The specification is Edexcel's own document; this page says which of our lessons teach point 4.1.7 and is not endorsed by the board.