220-802 Question #940: Real Exam Question with Answer & Explanation

The correct answer is A: 1. In the 2.4 GHz Wi-Fi band, only channels 1, 6, and 11 are non-overlapping. Each channel occupies a 22 MHz range, so channels that are fewer than 5 apart will overlap and cause co-channel or adjacent-channel interference. WAP1 is on channel 6, while WAP2 and WAP3 are on channels 8

Question

After performing a wireless survey, a technician reports the following data: WAP Name Channel WAP1 6 WAP2 8 WAP3 9 Which of the following channels should the technician use for the SOHO WAP to be installed next?

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Explanation

In the 2.4 GHz Wi-Fi band, only channels 1, 6, and 11 are non-overlapping. Each channel occupies a 22 MHz range, so channels that are fewer than 5 apart will overlap and cause co-channel or adjacent-channel interference. WAP1 is on channel 6, while WAP2 and WAP3 are on channels 8 and 9 (both overlapping with 6 and 11). Channel 11 would still experience interference from channels 8 and 9. Channel 1 is the furthest away from all three existing channels (6, 8, and 9) and has no spectral overlap with any of them, making it the optimal choice to minimize interference and maximize performance.

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