CompTIA
220-801 · Question #52
220-801 Question #52: Real Exam Question with Answer & Explanation
The correct answer is A: 1, 6,11. In the 2.4 GHz Wi-Fi band, channels 1, 6, and 11 are the only three non-overlapping channels, minimizing co-channel interference between access points.
Question
Which of the following channels should a technician choose when installing multiple wireless access points for a small office home office (SOHO) network to provide the MINIMAL interference?
Options
- A1, 6,11
- B2, 5,10
- C3, 7,9
- D4, 5,8
Explanation
In the 2.4 GHz Wi-Fi band, channels 1, 6, and 11 are the only three non-overlapping channels, minimizing co-channel interference between access points.
Common mistakes.
- B. Channels 2, 5, and 10 overlap with each other and with neighboring channels, causing significant co-channel and adjacent-channel interference.
- C. Channels 3, 7, and 9 are not non-overlapping - channel 3 and 7 overlap, and this combination does not follow the 5-channel separation rule.
- D. Channels 4, 5, and 8 are sequential and heavily overlapping, producing maximum interference rather than minimal.
Concept tested. Non-overlapping 2.4 GHz Wi-Fi channel selection
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