During WLAN planning and design, channels 1, 6, and 11 are recommended on the 2.

On the 2.4 GHz band, only three non-overlapping channels exist: 1, 6, and 11.

In high-density WLAN scenarios, channels like 1, 5, 9, and 13 can be used with lower transmit power to reduce co-channel interference — though they slightly overlap, they can work in dense deployments when managed properly.

On the 5 GHz band, there are many non-overlapping channels. It’s recommended to stagger high and low channels among adjacent APs to avoid interference.

Correct answer: A. TRUE