A new wireless client is configured to join a 802.

The correct answer is A because the client can already see the wireless network and is sending association requests, which means the SSID and channel are likely correct. In wireless networking, association is the process of a client connecting to an access point. CEH wireless material explains that clients must associate with an AP before using the network, and MAC filtering is a control that allows only listed wireless NIC MAC addresses to associate with the AP. If the client’s MAC address is missing from the allowed list, the WAP may ignore or reject the association attempt. DHCP is not the best answer because DHCP occurs after Layer 2 wireless association, when the client is already connected enough to request IP configuration. The client also cannot be on the wrong channel if it can see the network and send association frames. Therefore, the most likely problem is MAC filtering on the WAP.