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Difficulty: EasyWireless Networking Standards and Technologies

A field technician is setting up a wireless access point in a central hallway between two existing access points that operate on 2.4 GHz channels 1 and 11. To prevent signal interference while following standard 2.4 GHz channel allocation rules, which channel should the technician assign to the new access point?

  1. Channel 6Answer
  2. B
    Channel 2
  3. C
    Channel 5
  4. D
    Channel 10

Answer

Channel 6 is the correct choice because 1, 6, and 11 are the standard non-overlapping channels in the 2.4 GHz wireless frequency spectrum.
In 2.4 GHz wireless networking using standard 20 MHz channel widths, channels 1, 6, and 11 are the only three channels that do not overlap with each other. Given that adjacent access points already use channels 1 and 11, setting the middle access point to Channel 6 ensures zero adjacent-channel interference.

Step-by-Step Solution

1
Identify the operating frequency band and channel spacing rules.
The 2.4 GHz Wi-Fi spectrum uses 20 MHz wide channels spaced 5 MHz apart.
Because channels overlap if separated by less than 25 MHz, only specific channels do not interfere with each other.
2
Determine the non-overlapping channel set for the 2.4 GHz band.
Channels 1, 6, and 11 provide maximum channel separation without spectral overlap.
Using these three channels allows adjacent access points to co-exist without adjacent-channel noise.
3
Select the missing non-overlapping channel from the given setup.
With channels 1 and 11 already assigned to neighbor access points, channel 6 fills the remaining non-overlapping assignment.
Assigning channel 6 completes a clean 2.4 GHz channel reuse scheme.

Key Concept

2.4 GHz Wireless Non-Overlapping Channels (1, 6, 11)
Estimated Time:45s
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Topics

Wireless Networking Standards and Technologies

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