Which DNS A-record hostname must point to a new AireOS WLC so CAPWAP APs can discover it?

The correct DNS A-record hostname for CAPWAP AP discovery of a new AireOS WLC is CISCO-CAPWAP-CONTROLLER. This specific hostname is a predefined standard used by Cisco APs to locate a Wireless LAN Controller (WLC) via DNS. When an AP boots up and cannot find a WLC through other discovery methods (like DHCP options), it attempts to resolve this hostname to an IP address. If a DNS server returns the IP address of a WLC for this hostname, the AP will attempt to establish a CAPWAP tunnel with that controller. The other options are incorrect because they do not match the exact, case-sensitive hostname that Cisco APs are programmed to query for WLC discovery.