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Difficulty: MediumWired and Wireless Network Issues

A field technician is troubleshooting network performance issues in a newly renovated office building. Users in the open workspace report frequent disconnects and sluggish speeds on the 2.4 GHz wireless network, while a wired workstation in an adjacent office displays an IP address of 169.254.10.45 and cannot connect to local network resources. Which TWO of the following actions should the technician take to resolve these issues?

  1. Reconfigure the 2.4 GHz wireless access points to use non-overlapping channels 1, 6, and 11.Answer
  2. Check physical layer connectivity and verify the available scope on the DHCP server for the wired subnet.Answer
  3. C
    Set adjacent 2.4 GHz access points to channels 2, 3, and 4 to evenly space out wireless client traffic.
  4. D
    Reassign the static DNS server configuration on the wired workstation to resolve the 169.254.x.x address assignment.

Answer

The technician must reconfigure the 2.4 GHz wireless access points to non-overlapping channels (1, 6, and 11) to eliminate Wi-Fi interference, and inspect physical network connections and DHCP scope availability to resolve the workstation's APIPA address issue.
Configuring 2.4 GHz access points to non-overlapping channels (1, 6, and 11) resolves wireless co-channel interference, while checking physical connections and DHCP scope availability addresses the root cause of an APIPA address assignment (169.254.x.x).

Step-by-Step Solution

1
Analyze the wireless network symptom.
Frequent disconnects on 2.4 GHz Wi-Fi indicate radio frequency interference caused by overlapping channel configurations across nearby access points.
The 2.4 GHz spectrum only has three non-overlapping channels in standard deployment: 1, 6, and 11.
2
Analyze the wired network symptom.
The workstation's IP address (169.254.10.45) is an APIPA address assigned automatically by Windows when no DHCP server responds.
This points directly to a Layer 1 physical disconnect, switch port misconfiguration, or an exhausted DHCP server pool.
3
Select the correct corrective actions.
Migrate access points to channels 1, 6, and 11, and verify link status/DHCP server operations for the wired client.
These steps address the root causes for both the wireless signal degradation and the wired IP configuration failure.

Key Concept

Wired Link/DHCP Failures and 2.4 GHz Channel Overlap Troubleshooting
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Topics

Wired and Wireless Network Issues

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