Refer to the exhibit.

What type of message will be used by the lightweight access point (LAP) in an attempt to
locate the wireless LAN controller (WLC)?

A.
The LAP will send out a DNS request. In return, the DNS server will provide the WLC
domain name.

B.
The LAP will send out a Layer 3 LWAPP discovery request to the WLC on the wireless
network.

C.
The LAP will send out a DHCP request. In return, the DHCP server will provide the IP
addresses for the LAP and the WLC.

D.
The LAP will send out a Layer 2 LWAPP discovery request to the WLC on the wireless
network.

Explanation:

Here is an example. Assume that, in the subnet 172.16.1.0/16, you have an LAP that is
already registered with the WLC, and OTAP is enabled on the WLC. When the new LAP in
the 192.168.1.0/24 subnet comes up, the LAP looks for a DHCP server and gets an IP
address (if no assignment was made previously with a static IP address). The LAP then
sends out a discovery request to the local subnet. Because in this scenario there is no WLC
in the local subnet, the LAP tries to use OTAP in order to discover WLCs. The LAP listens to
neighbor messages that are sent over the air by the LAPs (in the 172.16.1.0/16 subnet) that
are already registered and looks for WLC IP addresses. From the list of WLC IP addresses
that the new LAPs learn from the neighbor messages, the new LAPs send out a Layer 3
LWAPP discovery request to the WLCs. The WLCs that receive this discovery request
respond with a Layer 3 LWAPP discovery response.
Reference:
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a00806c9e51.s
html#topic2