Refer to the exhibit.

Security settings and authorized device list.
A VSC defined on an HP MSM controller enforces WPA2 encryption with preshared keys (PSK).
For additional security, APs should allow only the company’s authorizes defined device connect.
The exhibit shows the list that the network administrator has defined with MAC addresses. Users
are having connecting to the WLAN.
What might be the cause of this problem?

A.
The VSC does not support WPA2 and AES-CCMP, but the clients require this encryption for
802.1n.

B.
This form of MAC filtering is not compatible with any other form of authorization except 802.1X
authentication.

C.
The MAC addresses have been entered in the wrong format.

D.
The list has been applied as a block list instead of as an allow list.

Explanation:

As showed in the picture the filter is applied as BLOCK while must be applied as ALLOW.