Question

Difficulty: EasyTroubleshooting Wireless Connectivity and Signal Issues

A network technician is setting up three wireless access points in a small office on the 2.4 GHz band. The technician notices performance issues and interference when using channels 1, 2, and 3. Which channel assignment strategy should the technician use to eliminate channel overlap?

  1. Assign the access points to channels 1, 6, and 11.Answer
  2. B
    Assign the access points to channels 1, 3, and 5.
  3. C
    Configure APIPA addressing on all wireless client devices.
  4. D
    Place each access point on a separate switch VLAN.

Answer

Assign the access points to channels 1, 6, and 11.
In 2.4 GHz Wi-Fi deployments, standard channels are 20 MHz wide with 5 MHz separation between channel centers. To avoid adjacent-channel interference, channels must be at least 5 channels apart. Channels 1, 6, and 11 are the standard set of non-overlapping channels in North America and international 2.4 GHz deployments.

Step-by-Step Solution

1
Identify the wireless frequency band specified in the scenario.
The network operates on the 2.4 GHz band with standard 20 MHz channels.
Channel separation rules depend on the specific Wi-Fi frequency band.
2
Determine the standard non-overlapping channels for 2.4 GHz.
Channels 1, 6, and 11 are separated by 25 MHz (5 channel numbers), preventing spectral overlap.
Using non-overlapping channels prevents co-channel and adjacent-channel interference.

Key Concept

2.4 GHz Non-Overlapping Channels
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