An engineer is deploying a wireless infrastructure and must use Layer 2 discovery for access point association. Which configuration meets this requirement?

Configuring the Access Points and the WLC management interface on the same VLAN allows APs to discover the WLC using Layer 2 broadcast messages (e.g., CAPWAP discovery requests). Layer 2 discovery relies on broadcast communication, which is confined to a single VLAN or broadcast domain.

Configuring a DNS A RECORD is a Layer 3 discovery method, allowing APs to resolve the WLC's IP address by hostname, which works across subnets rather than within a single Layer 2 segment.

Configuring DHCP option 43 provides the WLC's IP address to the AP via DHCP, which is a Layer 3 discovery method designed for APs located in different subnets from the WLC.

Configuring the AP using a serial connection to indicate its controller is a manual, static configuration method, not a dynamic discovery method, and does not specifically enable Layer 2 discovery.