This deep dive covers Real-World Example: Loading a Webpage 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 8 of 11 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Real-World Example: Loading a Webpage
When you visit www.bbc.co.uk, data flows through ALL FOUR LAYERS:
Layer 4 - Application: Browser uses HTTP to request webpage
Layer 3 - Transport: TCP breaks request into segments, adds port number (80)
Layer 2 - Internet: IP adds source/destination IP addresses, routers find path
Layer 1 - Link: Ethernet/WiFi transmits frames over cables/radio waves
At destination, process reverses: Link → Internet → Transport → Application!
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.