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.