Given: ABC Company is implementing a secure 802.11 WLAN at their headquarters building in New York and at each of the 10 remote branch offices around the world.

If all access points (at the headquarters building and all branch offices) connect to a single WLAN controller located at the headquarters building, what additional security mechanisms should be considered?

A.
An encrypted connection between the WLAN controller and each lightweight AP should be used or all branch offices should be connected to the headquarters building with a VPN.

B.
Only WPA2-Personal or WPA2-Enterprise should be implemented to ensure strong encryption and authentication controls are in use by stations.

C.
Remote sensors should be installed at the headquarters building and at all branch offices to provide wireless intrusion prevention services.

D.
RADIUS services should be provided at each branch office so that user authentication is kept on the local network.