Lesson 7: Wireless Networking
Week of Tue, Oct 27 · lesson closes Mon, Nov 2
Take Meerk's quiz for Lesson 7
This lesson's items
Exact due times are in Canvas.
Watch — Professor Messer
Watch — Professor Messer: Wireless (N10-009)
Free, independent educational resource. Not affiliated with or endorsed by CompTIA. Watch, then read the notes below.
Know these cold
- 802.11 standards: a (5GHz/54Mbps), b/g (2.4GHz), n (MIMO, dual-band), ac/Wi-Fi 5 (5GHz, MU-MIMO, 3.5Gbps), ax/Wi-Fi 6 (OFDMA, dual-band, dense), Wi-Fi 6E (6GHz band added).
- Wireless security: WEP (broken RC4), WPA (TKIP), WPA2 (AES/CCMP), WPA3 (SAE, GCMP-256, perfect forward secrecy).
- Wireless site survey: verify coverage, identify channel interference, document AP placement. Non-overlapping 2.4GHz channels: 1, 6, 11.
Meerk's quiz — open the Lesson 7 gate
10 questions, no time limit. 85% on your first attempt in a 24-hour window opens the gate. Retakes inside the window are practice — they help you learn, they don't count. Work alone; the point is to know it, not to have seen it.
Dinner Table Question
Ask at home: Why are public Wi-Fi networks at airports still dangerous even when they require a password?
En español: ¿Por qué las redes Wi-Fi públicas en aeropuertos siguen siendo peligrosas aunque requieran contraseña?