Which WLC discovery method uses CISCO-CAPWAP-CONTROLLER as an identifier?

Question

Options

• Astatic configuration
• BDHCP
• CL3 broadcast
• DDNS

• A
  6% (3)
• B
  4% (2)
• C
  2% (1)
• D
  89% (48)

Explanation

DNS uses CISCO-CAPWAP-CONTROLLER as the hostname identifier, where an access point queries DNS to resolve this specific name to the IP address of a Wireless LAN Controller (WLC). The AP appends the local domain name to this identifier and sends a DNS query, making it a dynamic and scalable discovery method.

Why the distractors are wrong:

• Static configuration (A) requires manually entering the WLC's IP address directly into the AP - no hostname or identifier is used.
• DHCP (B) uses Option 43 (vendor-specific) to deliver the WLC's IP address to the AP, not a named identifier.
• L3 broadcast (C) simply sends a broadcast across the local subnet to discover a WLC - no identifier string is involved.

Memory Tip: Think "DNS = Name" - DNS is the only method that uses a named identifier like CISCO-CAPWAP-CONTROLLER, because that's literally what DNS does: resolve names to IP addresses. If you see a hostname-style identifier in a question, always think DNS.

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