Which AP to Wireless LAN Controller discovery process requires a previous association of the AP with a Cisco WLC?

AP priming is a WLC discovery method where an access point (AP) is pre-configured with a WLC's IP address by previously connecting to that WLC, allowing it to remember the controller's address for future connections. This process establishes a 'prime' controller for the AP to connect to, making it unnecessary for the AP to go through full discovery if it loses connection or reboots.

Defining a master controller is a concept for redundant WLCs but does not specifically refer to an AP's initial discovery or pre-association.

DHCP Option 6 is used for DNS server discovery, not for WLC discovery.

DHCP Option 43 is used to provide WLC IP addresses to APs as part of the initial discovery process, not requiring a previous association.

Over-the-air provisioning allows an AP to discover a WLC using broadcast or multicast, which does not require a previous association.