Edexcel GCSE Computer Science 2020
4.1.7: understand how the 4-layer (application, transport, internet, link) TCP/IP model handles data transmission over a network
4.1.7: understand how the 4-layer (application, transport, internet, link) TCP/IP model handles data transmission over a network
| Keyword | Definition |
|---|---|
| application | highest level of the TCP/IP protocol stack which determines how programs request and send data over a network (e.g. HTTP) |
| internet | second lowest level of the TCP/IP protocol stack which determines how packets are routed to the right destination over a network (e.g. IP) |
| layer | level of abstraction in a model of how different devices communicate over a network |
| link | lowest level of the TCP/IP protocol stack which determines how individual bits and bytes are sent over a network (e.g. Ethernet / WiFi) |
| network protocol | set of rules which determine how computers communicate over a network |
| TCP/IP | transfer control protocol and internet protocol |
| transport | second highest level of the TCP/IP protocol stack which determines how data is split into packets and reassembled in the correct order (e.g. TCP) |
