139. AQA A Level SLR21 Structure of the internet
About this video
AQA Specification Reference
A Level 4.9.3.1
This video provides a brief overview of the structure of the Internet. We look at the role of Packet Switching, Routers, Gateways and consider where and why they are used.
Key questions:
- How is the internet structured?
- What is the purpose of a router and a gateway?
00:00 Structure of the internet
00:09 Intro
00:14 The internet
01:21 The physical structure of the internet
02:05 Network hardware
02:30 Routers
03:16 Gateway
03:49 Key questions
04:01 Going beyond the specification
04:12 Network hardware continued
04:27 Modem
05:00 Modem/router
05:27 Cables
05:42 Cables - Twisted pair
06:03 Cables - Coaxial
06:39 Cables - Fibre optic
07:12 Network interface controller (NIC)
07:39 Hub
08:08 Switch
08:39 Multi-purpose devices
09:09 Outro
Last updated: 30.10.25
