220-801 Question #534: Real Exam Question with Answer & Explanation

The correct answer is A: 1 and 11. In the 2.4 GHz Wi-Fi band, there are only three non-overlapping channels: 1, 6, and 11. Any two channels that overlap in frequency will cause crosstalk and interference. Channels 1 and 11 (A) are 10 channels apart - the maximum possible separation in the 2.4 GHz spectrum - making

Question

Which of the following channels, when used in close proximity to one another, provide the BEST protection against crosstalk?

Options

A1 and 11
B2 and 10
C6 and 1
D6 and 11

Explanation

In the 2.4 GHz Wi-Fi band, there are only three non-overlapping channels: 1, 6, and 11. Any two channels that overlap in frequency will cause crosstalk and interference. Channels 1 and 11 (A) are 10 channels apart - the maximum possible separation in the 2.4 GHz spectrum - making them completely non-overlapping and providing the best protection against crosstalk. Channels 2 and 10 (B) overlap with adjacent channels. Channels 6 and 1 (C) and 6 and 11 (D) are also non-overlapping, but channels 1 and 11 together have the greatest spectral distance of any two-channel pair, offering maximum isolation.

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