When channel 1 of the 2.4GHz frequency band in the coverage area has a lot of interference and is serious, adjusting the device to channel 3 can effectively reduce interference.

Question

Options

• ATrue
• BFalse

• A
  19% (13)
• B
  81% (55)

Explanation

Option B (False) is correct because in the 2.4GHz band, channels 1 and 3 overlap significantly - each channel occupies 22MHz of bandwidth, and adjacent channels are only 5MHz apart, meaning channels 1 through 5 all interfere with each other. Switching from channel 1 to channel 3 would not escape the interference; it would still share spectrum with channel 1. Option A is wrong because it assumes any channel change reduces interference, when in fact only switching to a truly non-overlapping channel achieves separation. The three non-overlapping channels in the 2.4GHz band are 1, 6, and 11 (in most regions), so the correct fix for congestion on channel 1 is to move to channel 6 or 11, not channel 3.

Memory tip: Remember "1, 6, 11" as the only safe non-overlapping channels in 2.4GHz - any channel outside that set still bleeds into its neighbors and will not solve interference problems.

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