What you'll learn
How computers connect and communicate.
Key ideas
- LAN (local) vs WAN (wide area) networks.
- Protocols are rules for communication; data travels in packets.
- Routers direct data; topologies describe layout; HTTP transfers web pages.
Exam tips
- Learn common protocols and their uses.
- Distinguish LAN from WAN.
Common mistakes
- Confusing LAN and WAN.
- Muddling protocols.