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Difficulty: EasyWireless Network Deployment and Standards

A network technician is deploying three wireless access points (APs) to cover adjacent office areas using the 2.4 GHz frequency band. To minimize co-channel interference and maintain optimal throughput, which combination of non-overlapping channels should the technician assign to the access points?

  1. Channels 1, 6, and 11Answer
  2. B
    Channels 1, 2, and 3
  3. C
    Channels 2, 4, and 6
  4. D
    Channels 5, 10, and 15

Answer

Channels 1, 6, and 11
In 2.4 GHz Wi-Fi deployments, each standard 20 MHz channel occupies a frequency envelope that extends across adjacent channel numbers. To deploy multiple access points within wireless range of one another without causing adjacent-channel interference, administrators must select non-overlapping channels. In North America and standard international guidelines, channels 1, 6, and 11 are the primary three channels that do not overlap.

Step-by-Step Solution

1
Identify the operating frequency band and channel bandwidth requirement.
The scenario specifies the 2.4 GHz frequency band using standard 20 MHz channel widths.
Understanding the channel spacing in 2.4 GHz is necessary to determine non-overlapping frequency ranges.
2
Calculate the required channel separation to prevent spectral overlap.
Each 2.4 GHz channel is spaced 5 MHz apart, requiring a separation of at least 5 channel numbers (25 MHz total band width including guard bands) to avoid overlap.
Selecting non-overlapping channels ensures access points operating in close proximity do not interfere with each other.
3
Select the standard set of three non-overlapping 2.4 GHz channels.
Channels 1, 6, and 11 represent the three primary non-overlapping channels in standard 2.4 GHz deployments.
This configuration maximizes spatial frequency reuse without introducing adjacent-channel noise.

Key Concept

2.4 GHz Non-Overlapping Wireless Channels
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Topics

Wireless Network Deployment and Standards

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