N10-005 · Question #650
N10-005 Question #650: Real Exam Question with Answer & Explanation
The correct answer is C: Change the channel on the access point to channel 11.. With four other 802.11n access points in the office environment, the executive's AP is very likely experiencing co-channel or adjacent-channel interference. In the 2.4 GHz band used by 802.11n, the three non-overlapping channels are 1, 6, and 11. If neighboring APs are using the
Question
Options
- ATurn off SSID broadcasting for the executive's access point.
- BReplace the 802.11n access point in the office with an 802.11a access point.
- CChange the channel on the access point to channel 11.
- DTurn off as many lights in the executive's office as possible to reduce interference.
Explanation
With four other 802.11n access points in the office environment, the executive's AP is very likely experiencing co-channel or adjacent-channel interference. In the 2.4 GHz band used by 802.11n, the three non-overlapping channels are 1, 6, and 11. If neighboring APs are using the same or overlapping channels, they compete for airtime and cause signal degradation. Changing the executive's AP to a non-overlapping channel (such as channel 11) reduces interference. Disabling SSID broadcasting only hides the network name and does not reduce RF interference. Replacing with 802.11a changes the frequency band entirely (5 GHz), which could help but is a more disruptive and costly change. Turning off lights has negligible effect on 802.11n radio interference.
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