220-801 · Question #2
Which of the following lists the correct non-overlapping channels in 2.4 GHz?
The correct answer is A. 1,6,11. In the 2.4 GHz band, channels are each 22 MHz wide and spaced only 5 MHz apart. This means most channels overlap with their neighbors. Only channels 1, 6, and 11 are spaced far enough apart (25 MHz between center frequencies) to be completely non-overlapping. Using these three…
Question
Which of the following lists the correct non-overlapping channels in 2.4 GHz?
Options
- A1,6,11
- B2,4,6,8,10
- C3,6,9
- D5,11
How the community answered
(36 responses)- A94% (34)
- B3% (1)
- D3% (1)
Explanation
In the 2.4 GHz band, channels are each 22 MHz wide and spaced only 5 MHz apart. This means most channels overlap with their neighbors. Only channels 1, 6, and 11 are spaced far enough apart (25 MHz between center frequencies) to be completely non-overlapping. Using these three channels for adjacent access points prevents co-channel interference. In some regions, channels 1, 5, 9, and 13 can also be non-overlapping, but 1/6/11 is the standard for the US and most of the world.
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