This introduction covers The Four-Layer Network Stack within TCP/IP Layers for GCSE Computer Science. Revise TCP/IP Layers in Networks for GCSE Computer Science with 15 exam-style questions and 18 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 1 of 10 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 1 of 10
Practice
15 questions
Recall
18 flashcards
The Four-Layer Network Stack
When you send data across the Internet, it doesn't just magically appear at the destination. It passes through four distinct layers, each with a specific job. The TCP/IP model divides network communication into these layers: Application (what you see), Transport (reliable delivery), Internet (routing), and Link (physical transmission). Think of it like sending a letter: you write the message (Application), put it in an envelope with address (Transport), the postal service routes it (Internet), and it's physically carried by van/plane (Link)!