This key facts covers Quick Reference - TCP/IP Layers within TCP/IP Layers for GCSE Computer Science. Revise TCP/IP Layers in 3.5 Fundamentals of Computer Networks for GCSE Computer Science with 16 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 10 of 11 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Quick Reference - TCP/IP Layers
- 4 - Application: HTTP, SMTP, FTP, DNS (what you use)
- 3 - Transport: TCP (reliable), UDP (fast)
- 2 - Internet: IP (routing, IP addresses)
- 1 - Link: Ethernet, WiFi (physical transmission, MAC addresses)
Remember: Data goes DOWN layers when sending (App→Link), UP layers when receiving (Link→App)!
Practice questions for TCP/IP Layers
How many layers does the TCP/IP model have?
Describe what the Internet layer does in the TCP/IP model.