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Zorluk: KolayWired and Wireless Network Issues

A network technician is investigating intermittent wireless connectivity drops reported in a corporate training room. During the site survey, the technician observes that adjacent 2.4 GHz access points are configured to use channels 1, 2, 3, and 4. Which of the following is the MOST likely cause of the network instability?

  1. Wireless signal degradation caused by adjacent-channel interferenceCevap
  2. B
    Failure of the DHCP server to resolve domain names to IP addresses
  3. C
    Inability of an unmanaged Layer 2 switch to route traffic between wireless subnets
  4. D
    Unlit network interface card (NIC) link lights on the client laptops

Cevap

Wireless signal degradation caused by adjacent-channel interference is the most likely cause of the issue.
In 2.4 GHz Wi-Fi networks, each channel occupies 20 MHz of bandwidth while channels are spaced only 5 MHz apart. As a result, adjacent channels overlap significantly. Using non-adjacent channels (1, 6, and 11) is essential to avoid adjacent-channel interference. Setting access points to channels 1, 2, 3, and 4 causes severe radio frequency collision and packet loss.

Adım Adım Çözüm

1
Analyze the reported environment and wireless configuration.
Access points in the 2.4 GHz band are set to channels 1, 2, 3, and 4.
Identifying the channel allocation plan is critical for diagnosing Wi-Fi performance degradation.
2
Evaluate wireless frequency overlap standards for the 2.4 GHz band.
The 2.4 GHz Wi-Fi spectrum only supports three non-overlapping 20 MHz channels: 1, 6, and 11.
Channels 2, 3, and 4 overlap with channel 1, creating significant adjacent-channel interference (ACI).
3
Determine the root cause of the intermittent drops.
Adjacent-channel interference causes corrupted frames, high packet loss, and frequent client disconnections.
Reconfiguring access points to non-overlapping channels (1, 6, 11) resolves the interference.

Anahtar Kavram

2.4 GHz Non-Overlapping Channels and Wireless Interference
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Konular

Wired and Wireless Network Issues

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