What you'll learn
How computers connect and share data.
Key ideas
- LAN vs WAN; protocols are the rules of communication.
- Data travels in packets; routers direct it.
- Topologies describe layout; bandwidth is data capacity.
Exam tips
- Distinguish LAN from WAN.
- Link bandwidth to network speed.
Common mistakes
- Confusing LAN and WAN.
- Mixing up topology and protocol.