Computer Networking › Section G · Wireless and mobile networks › Topic G.2
Wireless LANs: 802.11
Wi-Fi, the IEEE 802.11 family, is how most laptops and phones reach the internet indoors. This topic follows a station as it finds an access point, takes turns on a shared radio channel and gets its frames safely to a router.
In this topic
- One family, many generations
- Access points, BSSs and SSIDs
- Finding and joining an access point
- No collision detection, so acknowledge everything
- CSMA/CA step by step
- Worked example: two stations back off
- RTS and CTS for hidden terminals
- The 802.11 frame
- Worked example: addresses through an AP
- Roaming, rate adaptation and sleep
- Common mistakes to avoid
- Key takeaways
This topic is part of Wuanberri Pro. Checking your access…