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Zorluk: OrtaWired and Wireless Network Issues

A field technician is deploying a new wireless access point (AP) in an office area where existing 2.4 GHz APs operate on channels 1 and 6. To prevent using the same channel as neighboring devices, the technician manually sets the new AP to channel 4. Shortly after deployment, users connected to all nearby access points report severe throughput degradation and frequent packet loss. Which of the following is the most likely cause of this network issue?

  1. Channel 4 overlaps with both channel 1 and channel 6, resulting in adjacent-channel interference.Cevap
  2. B
    The local DNS server is attempting to issue IP address leases on channel 4 instead of broadcasting hostnames.
  3. C
    The new access point requires a dedicated Layer 3 router rather than a switch to segment wireless radio frequencies.
  4. D
    The technician failed to verify the link light status on the wired network interface card connecting the access point.

Cevap

Channel 4 overlaps with both channel 1 and channel 6, resulting in adjacent-channel interference.
In 2.4 GHz Wi-Fi standards, each channel is 20 MHz wide with center frequencies separated by only 5 MHz. Consequently, only channels 1, 6, and 11 do not overlap with one another. Placing an access point on channel 4 causes it to share and interfere with frequency ranges used by both channel 1 and channel 6, generating severe adjacent-channel interference and reducing network throughput.

Adım Adım Çözüm

1
Analyze the wireless frequency spectrum configuration described in the scenario.
The environment uses 2.4 GHz Wi-Fi, and the technician selected channel 4 alongside existing channels 1 and 6.
Understanding the channel allocation rules for 2.4 GHz Wi-Fi is critical to diagnosing wireless performance issues.
2
Evaluate standard non-overlapping channel specifications for 2.4 GHz networks.
In 2.4 GHz North American deployments, each channel occupies 20 MHz of bandwidth with 5 MHz spacing, making channels 1, 6, and 11 the only non-overlapping channel set.
Channels between 1 and 6 (such as 2, 3, 4, and 5) overlap partial frequency ranges of both channel 1 and channel 6.
3
Identify the symptom caused by setting an AP to an overlapping channel.
Adjacent-channel interference causes signal corruption, retransmissions, increased packet loss, and severe speed degradation for connected clients.
Selecting channel 4 creates cross-talk interference with traffic on both channel 1 and channel 6.

Anahtar Kavram

2.4 GHz Wireless Non-Overlapping Channels (1, 6, 11)
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Konular

Wired and Wireless Network Issues

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