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Question 55

You administer a small WLAN with nine access points. As a small business, you do not run a RADIUS server and use WPA2-Personal for security. Recently, you changed the passphrase for WPA2-Personal in all APs and clients. Several users are now reporting the inability to connect to the network at times and it is constrained to one area of the building. When using a WLAN scanner, you see that the AP covering that area is online and has a strong signal. No other changes have been made to the environment and all access points are the same model. What is the likely problem?

    Correct Answer: D

    The likely problem is that the access point covering the problem area is improperly configured. Given that the AP is online and has a strong signal, it is unlikely to be a firmware issue or failure. If clients were improperly configured, the issue would be widespread rather than limited to one area. Therefore, an improper configuration specific to the problem area's AP is the most plausible cause.

Discussion
boy_with_nikonOption: D

It should be D

EAGOption: D

A is wrong because since all APs are of the same model, a firmware update requirement on one will imply that all others also need a firmware update, and if this were the case, all APs would be down and no client STA could connect to the WLAN. B is wrong because the question speaks of users being unable to connect to the network atimes. If this were the correct answer, the users involved would never be able to connect to the network, and the problem would not be confined only to a particular area of the network. C is wrong because if this were true, the WiFi scanner would not detect the AP as having strong signals. D is thus the answer. AP is incorrectly configured and that is why the problem is configured to a particular area, which will be the coverage area of that particular AP.