Lesson 4: Wireless Networking
Week of Tue, Oct 6 · lesson closes Mon, Oct 12
Take Meerk's quiz for Lesson 4
This lesson's items
Exact due times are in Canvas.
Watch — Professor Messer
Watch — Professor Messer: Wireless Networking (220-1201)
Free, independent educational resource. Not affiliated with or endorsed by CompTIA. Watch, then read the notes below.
Know these cold
- 802.11 standards: 802.11a (5GHz), 802.11b/g (2.4GHz), 802.11n (dual-band, MIMO), 802.11ac/Wi-Fi 5 (5GHz, MU-MIMO), 802.11ax/Wi-Fi 6 (OFDMA, dual-band, dense environments).
- Wi-Fi security: WEP (broken), WPA (TKIP), WPA2 (AES/CCMP — current minimum), WPA3 (strongest).
- Bluetooth: Classic (audio, files), BLE (IoT, fitness trackers). NFC: contactless payments (~4 cm range).
Meerk's quiz — open the Lesson 4 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 do public Wi-Fi hotspots at coffee shops feel slower than home Wi-Fi?
En español: ¿Por qué el Wi-Fi público en las cafeterías se siente más lento que el Wi-Fi de casa?