Users in an office building report frequent dropouts and poor throughput on the 2.4 GHz wireless network. A network administrator conducts a frequency audit and discovers that neighboring access points are assigned to non-overlapping channels 1, 6, and 11. However, the internal access point experiencing issues is configured to use Channel 3 with a 40 MHz channel bonding width. Which of the following identifies the primary root cause of the wireless performance degradation?
- The 40 MHz channel width centered on Channel 3 overlaps across channels 1 through 7, creating severe adjacent-channel interference with surrounding access points.Cevap
- BChannel 3 is a dedicated non-overlapping channel in the 2.4 GHz spectrum, indicating that the degradation is caused by building material attenuation rather than channel placement.
- CEnabling 40 MHz channel width in the 2.4 GHz band strips 802.1Q tags from wireless client frames, leading to a Layer 2 VLAN mismatch on the connected switchport.
- DThe channel width setting prevents client devices from sending DISCOVER requests, resulting in APIPA address assignments on all wireless endpoints.
Cevap
The 40 MHz channel width centered on Channel 3 spans channels 1 through 7, causing severe adjacent-channel interference with neighboring access points on channels 1 and 6.
In 2.4 GHz Wi-Fi deployments, using a 40 MHz channel width on an overlapping channel such as Channel 3 causes the signal footprint to cover channels 1 through 7. This creates massive adjacent-channel interference with nearby access points configured on channels 1 and 6, resulting in packet retransmissions, latency, and frequent disconnections.
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2.4 GHz Channel Overlap and Channel Width Configurations