Comprehensive and Detailed Explanation From Exact Extract:

In the 2.4 GHz Wi-Fi band, channels overlap due to how the frequency spectrum is divided. To prevent co-channel and adjacent-channel interference, only non-overlapping channels should be used. According to the IEEE 802.11 standard and best practices outlined in the CompTIA CloudNetX CNX-001 Study Guide under “Wireless Network Optimization,” the three non-overlapping channels in the 2.4 GHz band are:

Channel 1 (2.412 GHz)

Channel 6 (2.437 GHz)

Channel 11 (2.462 GHz)

These channels are spaced far enough apart to avoid interference, even when operating in close proximity. Using overlapping channels (as in options A, B, and D) causes signal degradation and poor performance due to increased contention and retransmissions.

Relevant Extract from CompTIA CloudNetX CNX-001:

“Wi-Fi networks operating on the 2.4 GHz band should use channels 1, 6, and 11 to ensure maximum throughput and minimal interference in environments with multiple access points.”

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