Edexcel 1CP2 4.1.6: Protocols
The free BugBot lessons that teach this point, a robot to try it on, and the past-paper questions that test it.
What it covers
Two devices can only communicate if they agree on the rules: what a message looks like, what order things happen in, and what to do when something goes wrong. Those rules are a protocol. You met the idea in module 9, where robots agreed on messages like forward 30. The internet runs on a set of protocols that every device in the world follows.
- Standards
- The protocols on the exam
- Requests and responses
Or do it in the simulator, with tasks that mark themselves
Lessons that teach it
- F10.7 Protocols Networks
Standards, and TCP, UDP, IP, HTTP, HTTPS, FTP, SMTP, POP and IMAP. - F10.9 Project: reliable delivery Networks
Deliver a report over a lossy radio with packets, acknowledgements and resending.
Try it on a robot
The task from F10.7 Protocols, running here. Change the program and press Run.
The specification is Edexcel's own document; this page says which of our lessons teach point 4.1.6 and is not endorsed by the board.