350-401 · Question #1004
350-401 Question #1004: Real Exam Question with Answer & Explanation
The correct answer is D: CISCO-CAPWAP-CONTROLLER. CISCO-CAPWAP-CONTROLLER is the specific, standardized DNS hostname that Cisco AireOS Wireless LAN Controllers are designed to respond to during the AP discovery process. When an AP boots up and cannot find a WLC through other methods (DHCP option 43, broadcast, etc.), it performs
Question
When a DNS host record is configured for a new Cisco AireOS WLC, which hostname must be added to allow APs to successfully discover the WLC?
Options
- ACONTROLLER-CAPWAP-CISCO
- BCISCO-CONTROLLER-CAPWAP
- CCAPWAP-CISCO-CONTROLLER
- DCISCO-CAPWAP-CONTROLLER
Explanation
CISCO-CAPWAP-CONTROLLER is the specific, standardized DNS hostname that Cisco AireOS Wireless LAN Controllers are designed to respond to during the AP discovery process. When an AP boots up and cannot find a WLC through other methods (DHCP option 43, broadcast, etc.), it performs a DNS lookup for this exact hostname, which must be configured in DNS to resolve to the WLC's IP address. Options A, B, and C are incorrect because they use different word orderings that Cisco's CAPWAP implementation does not recognize - the AP's firmware is hardcoded to look up the precise string "CISCO-CAPWAP-CONTROLLER," so any variation will result in a failed DNS lookup and the AP being unable to discover the WLC.
Memory Tip: Think of it as introducing yourself formally - Cisco (the company) comes first, followed by CAPWAP (the protocol), and then Controller (the device) last. Use the acronym "CCC" - Company, Protocol, Device - to remember the correct order: Cisco-CAPWAP-Controller.
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