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Difficulty: MediumWired and Wireless Network Issues

A network technician is troubleshooting performance issues with a newly installed wireless access point in a conference hall. Users connected to the 2.4 GHz band report frequent packet drops and high latency. A site survey reveals that neighboring access points in adjacent rooms are operating on channels 2, 3, and 4. Which of the following configuration changes should the technician implement to eliminate the interference?

  1. Reconfigure all access points on the 2.4 GHz spectrum to use channels 1, 6, and 11.Answer
  2. B
    Set the new access point to channel 5 to balance channel allocation between channels 4 and 6.
  3. C
    Configure the local DNS server to issue static IP address leases to 2.4 GHz wireless clients.
  4. D
    Run traceroute and ping commands on client laptops without inspecting the access point link lights.

Answer

Reconfigure all access points on the 2.4 GHz spectrum to use channels 1, 6, and 11.
In 2.4 GHz Wi-Fi deployments, channels 1, 6, and 11 are the only non-overlapping channels in standard regulatory domains. Reconfiguring the access points to operate strictly on these channels eliminates adjacent-channel interference, resolving packet loss and latency.

Step-by-Step Solution

1
Analyze the wireless spectrum environment.
Identify that channels 2, 3, and 4 overlap with one another in the 2.4 GHz frequency spectrum.
Channels in the 2.4 GHz band are 22 MHz wide and spaced 5 MHz apart, causing adjacent channels to interfere.
2
Select non-overlapping channels for deployment.
Assign channels 1, 6, and 11 across adjacent access points.
Channels 1, 6, and 11 have sufficient frequency separation to prevent co-channel and adjacent-channel interference.

Key Concept

2.4 GHz Wi-Fi Non-Overlapping Channel Selection
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Topics

Wired and Wireless Network Issues

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