A wireless client cannot connect to an 802.11 b/g BSS with a b/g wireless card. The client section of the access point does not list any active WLAN clients. What is a possible reason for this?

A.
The incorrect channel is configured on the client.

B.
The client’s IP address is on the wrong subnet.

C.
The client has an incorrect pre-shared key.

D.
The SSID is configured incorrectly on the client.

Explanation:
SSID is used to differentiate networks from one another, which has a maximum length of 32 characters.
Wireless network card configured with different SSIDs can access different networks. AP is often used to broadcast SSID. SSID discovery is done by active scanning. SSID will not be broadcasted for security reasons. Then users need to manually configure the SSID to access the network.
If a client cannot find the efficient network although the wireless card is working normally, the most likely cause is that SSID is configured incorrectly.