Given:
ABC Corporation’s 802.11 WLAN is comprised of a redundant WLAN controller pair (N+1) and 30 access points implemented in 2004. ABC implemented WEP
encryption with IPSec VPN technology to secure their wireless communication because it was the strongest security solution available at the time it was
implemented. IT management has decided to upgrade the WLAN infrastructure and implement Voice over Wi-Fi and is concerned with security because most Voice
over Wi-Fi phones do not support IPSec. As the wireless network administrator, what new security solution would be best for protecting ABC’s data?

A.
Migrate corporate data clients to WPA-Enterprise and segment Voice over Wi-Fi phones by assigning them to a different frequency band.

B.
Migrate corporate data and Voice over Wi-Fi devices to WPA2-Enterprise with fast secure roaming support, and segment Voice over Wi-Fi data on a separate
VLAN.

C.
Migrate to a multi-factor security solution to replace IPSec; use WEP with MAC filtering, SSID hiding, stateful packet inspection, and VLAN segmentation.

D.
Migrate all 802.11 data devices to WPA-Personal, and implement a secure DHCP server to allocate addresses from a segmented subnet for the Voice over WiFi phones.