300-360 · Question #124
A wireless engineer is hired to troubleshoot wireless network issues and discovers that the customer is using 802 11 ac access points with 80 MHz-wide channels in a high-density environment. Which…
The correct answer is C. Decrease the channel width. In high-density environments, using wide 80 MHz channels significantly reduces the number of available non-overlapping channels, leading to severe co-channel interference (CCI). For example, in the 5 GHz band, 80 MHz channels leave very few non-overlapping options compared to…
Question
A wireless engineer is hired to troubleshoot wireless network issues and discovers that the customer is using 802 11 ac access points with 80 MHz-wide channels in a high-density environment. Which solution addresses these issues?
Options
- ADisable RRM on the WLC.
- BDisable TPC on the WLC
- CDecrease the channel width.
- DIncrease the minimum data rate supported
How the community answered
(45 responses)- A7% (3)
- B13% (6)
- C78% (35)
- D2% (1)
Explanation
In high-density environments, using wide 80 MHz channels significantly reduces the number of available non-overlapping channels, leading to severe co-channel interference (CCI). For example, in the 5 GHz band, 80 MHz channels leave very few non-overlapping options compared to 20 MHz channels. The solution is to decrease the channel width (e.g., to 20 or 40 MHz), which increases the pool of non-overlapping channels, reduces CCI, and allows more APs to coexist without interfering with each other. Disabling RRM or TPC would remove automatic interference management, making the problem worse, and raising the minimum data rate-while useful for performance-does not resolve channel contention in a high-density deployment.
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