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Difficulty: MediumWireless Networking Standards and Technologies

A IT support specialist is installing a third wireless access point in a medical clinic to expand coverage across the facility. A site survey reveals that existing access points in adjacent areas are broadcasting on the 2.4 GHz band using channel 1 and channel 6. Which non-overlapping channel should the specialist configure on the new access point to avoid co-channel and adjacent-channel interference?

  1. Channel 11Answer
  2. B
    Channel 3
  3. C
    Channel 8
  4. D
    Channel 14

Answer

Channel 11 is the correct choice because 1, 6, and 11 are the three non-overlapping 22 MHz channels in the 2.4 GHz Wi-Fi spectrum.
The 2.4 GHz Wi-Fi spectrum has 14 total channels, but only channels 1, 6, and 11 do not overlap with each other in standard 20 MHz channel width deployments. Since channels 1 and 6 are already in active use, configuring the new access point to channel 11 completes the non-overlapping channel plan and prevents signal interference.

Step-by-Step Solution

1
Identify the operating band and non-overlapping channel rules.
The scenario specifies the 2.4 GHz wireless frequency band.
The 2.4 GHz spectrum requires 22 MHz channel spacing (5 MHz between channel centers), resulting in standard non-overlapping channels 1, 6, and 11.
2
Evaluate currently occupied channels.
Channels 1 and 6 are already utilized by nearby access points.
To prevent adjacent channel interference, the new access point must avoid channels 2 through 5 (which overlap with 1 and 6) and channels 7 through 10 (which overlap with 6).
3
Select the remaining valid non-overlapping channel.
Channel 11 provides clean separation without frequency overlap.
Channel 11 completes the standard 1/6/11 non-overlapping deployment scheme for 2.4 GHz wireless networking.

Key Concept

2.4 GHz Non-Overlapping Channels (1, 6, 11)
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Topics

Wireless Networking Standards and Technologies

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