What DNS parameter is used by a access point to determine the IP address of a WLC:
A. DNS A record
B. DHCP option 43
C. capwap-controller
D. lwapp-controller
What DNS parameter is used by a access point to determine the IP address of a WLC:
A. DNS A record
B. DHCP option 43
C. capwap-controller
D. lwapp-controller
the correct answer is B
When a Cisco Wireless Unified architecture is deployed, the LAPs can use a vendor-specific DHCP Option 43 to join specific Wireless LAN Controllers (WLCs) when the WLC is in a different subnet than the LAP. Refer to Wireless LAN Controller and Lightweight Access Point Basic Configuration Example and Lightweight AP (LAP) Registration to a Wireless LAN Controller (WLC) for information on how to configure an access point (AP) to join a WLC.
https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/97066-dhcp-option-43-00.html
answer is discusable :
From http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/70333-lap-registration.html
The LAP attempts to resolve the DNS name “CISCO-CAPWAP-CONTROLLER.local-domain” or “CISCO-LWAPP-CONTROLLER.local-domain”
DNS A records has nothing to do with AP’s :
https://kb.pressable.com/article/dns-record-types-explained/