H12-311_V3.0 · Question #299
Which of the following 2.4GHz frequency bands are non-overlapping channels? (Multiple choice)
The correct answer is A. 6 and 11 B. 3 and 8 D. 4 and 10. In the 2.4GHz band, each channel is 22MHz wide but channels are only 5MHz apart, so two channels must be at least 5 apart to avoid overlapping. Options A (6 and 11: difference of 5), B (3 and 8: difference of 5), and D (4 and 10: difference of 6) all meet this threshold, making…
Question
Which of the following 2.4GHz frequency bands are non-overlapping channels? (Multiple choice)
Options
- A6 and 11
- B3 and 8
- C4 and 8
- D4 and 10
How the community answered
(27 responses)- A74% (20)
- C26% (7)
Explanation
In the 2.4GHz band, each channel is 22MHz wide but channels are only 5MHz apart, so two channels must be at least 5 apart to avoid overlapping. Options A (6 and 11: difference of 5), B (3 and 8: difference of 5), and D (4 and 10: difference of 6) all meet this threshold, making them non-overlapping pairs.
Option C (4 and 8) is wrong because those channels are only 4 apart - just short of the required 5 - meaning their signals bleed into each other and cause interference.
Memory tip: Think of the classic North American non-overlapping trio: 1, 6, 11 - each exactly 5 channels apart. Any pair with a difference of 5 or more is non-overlapping; a difference of 4 or less means overlap. Use "five to survive" to remember the minimum gap needed.
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