A user wants to use his laptop through the wireless network. The wireless has been configured with DHCP, and a temporary WEP key has been assigned. Why the laptop fails to connect to the network?

A.
MAC filtering is enabled on the WAP.

B.
DNS server is not working properly.

C.
the network is out of wireless connections.

D.
this laptop is enabled for both 802.11b and 802.11g.