What you'll learn
How computers connect and communicate.
Key ideas
- LAN vs WAN; protocols are communication rules.
- Data travels in packets; routers connect networks.
- HTTP transfers web pages; an IP address identifies a device.
Exam tips
- Distinguish LAN from WAN.
- Learn what common protocols do.
Common mistakes
- Confusing LAN and WAN.
- Muddling IP addresses and URLs.