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3.5 Fundamentals of Computer NetworksDiagram

TCP/IP Four-Layer Model

Part of TCP/IP Layers · GCSE GCSE Computer Science revision

This diagram covers TCP/IP Four-Layer Model 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 2 of 11 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 2 of 11

Practice

16 questions

Recall

18 flashcards

TCP/IP Four-Layer Model

TCP/IP four-layer model diagram showing Layer 4 Application (HTTP, SMTP, FTP, DNS) at the top, Layer 3 Transport (TCP reliable delivery, UDP fast), Layer 2 Internet (IP routing and addressing), and Layer 1 Link (Ethernet, WiFi, MAC addresses) at the bottom, with arrows showing data flowing down layers when sending and up when receiving

Keep building this topic

Read this section alongside the surrounding pages in TCP/IP Layers. That gives you the full topic sequence instead of a single isolated revision point.

The Four-Layer Network StackLayer 4: Application LayerLayer 3: Transport LayerLayer 2: Internet Layer

Practice Questions for TCP/IP Layers

How many layers does the TCP/IP model have?

  • A. 3
  • B. 4
  • C. 5
  • D. 7
1 markfoundation

Describe what the Internet layer does in the TCP/IP model.

2 marksstandard

Quick Recall Flashcards

16 questions on TCP/IP Layers — practise free

Instant marking, adaptive difficulty, and 18 spaced repetition flashcards. Free until your GCSEs.

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The Four-Layer Network Stack

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Layer 4: Application Layer