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Difficulty: EasyWireless Networking Standards and Technologies

A technician is setting up two wireless access points in a small office using the 2.4 GHz band. The first access point is configured to operate on channel 1. Which channel should be assigned to the second access point to avoid frequency overlap?

  1. A
    Channel 2
  2. B
    Channel 3
  3. C
    Channel 5
  4. Channel 6Answer

Answer

Channel 6 should be assigned to the second access point to prevent frequency overlap with channel 1.
In the 2.4 GHz wireless spectrum, channels are spaced 5 MHz apart but are 20 to 22 MHz wide. To prevent adjacent-channel interference, access points must be separated by at least 5 channel numbers. The standard non-overlapping channels are 1, 6, and 11. Therefore, channel 6 is the correct choice to pair with channel 1.

Step-by-Step Solution

1
Identify the operating band and initial channel setup.
The network operates on the 2.4 GHz frequency band with the first AP set to channel 1.
Knowing the frequency band determines the channel spacing rules required to prevent interference.
2
Determine the non-overlapping channel rule for the 2.4 GHz band.
The standard non-overlapping channels in North America/standard 2.4 GHz deployment are channels 1, 6, and 11.
Each 2.4 GHz channel is 22 MHz wide (or 20 MHz in 802.11n/ax) with 5 MHz channel spacing, requiring at least 5 channels of separation to eliminate overlap.
3
Select the valid non-overlapping channel option.
Channel 6 is 5 channels away from channel 1 and does not overlap in frequency.
Assigning channel 6 ensures optimal wireless performance without co-channel or adjacent-channel interference.

Key Concept

2.4 GHz Non-Overlapping Wi-Fi Channels
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Topics

Wireless Networking Standards and Technologies

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