Which two LAN actions facilitate Layer 3 CAPWAP discovery for lightweight APs? (Choose two.)

Lightweight APs use CAPWAP to communicate with a Wireless LAN Controller (WLC). For Layer 3 discovery, DHCP option 43 is a common method where the DHCP server provides the WLC IP address to the AP. This allows the AP to directly contact the WLC. Configuring an ip helper-address on a router interface is crucial when the WLC is on a different subnet than the APs. The helper address forwards DHCP requests (including those with option 43) from the AP's subnet to the DHCP server, enabling the AP to receive the necessary WLC information. DHCP option 17 is for vendor-specific information but not standard WLC discovery. Port security and configuring the WLC IP on a LAN switch do not directly facilitate CAPWAP discovery.