What is the purpose of DHCP Option 43, and how is it used with WLANs?

A.
It provides clients with a temporary IP address on a restricted VLAN until 802.1X authentication is
completed. Then the client receives its long-term IP address.

B.
It provides IP address bindings for specific network nodes that require long-term IP address
assignments. WLAN controllers are configured to use Option 43 to receive long-term IP address leases
that are centrally managed with DHCP.

C.
It supports vendor-specific IP address attributes for node discovery purposes. APs use Option 43 with
vendor class identifiers to obtain the IP address of a centralized WLAN controller.

D.
It integrates a DHCP server with AAA servers and user databases to dynamically assign IP addresses
to client devices. During 802.1X, the AAA server uses Option 43 to notify the DHCP server what IP pool
the client’s address should be drawn from.