In the active-standby, negotiation of dual-link dual-device hot standby, the AP collects and compares the parameters carried in the () message responded by the active and standby AC to select the…

Question

Options

• ADiscovery Response
• BKeepalive
• CProbe
• DRequest

• A
  74% (20)
• B
  7% (2)
• C
  15% (4)
• D
  4% (1)

Explanation

Option A is correct because in the CAPWAP protocol's active-standby negotiation process, the AP first broadcasts a Discovery Request to locate available ACs, and both the active and standby ACs reply with Discovery Response messages containing parameters such as AC priority and current load. The AP then compares these parameters from both Discovery Responses to determine which AC assumes the active role.

Options B (Keepalive) and D (Request) are wrong because Keepalive messages are used to maintain an already-established CAPWAP tunnel, while Request messages are sent by the AP to initiate tunnel setup after selection is complete -- neither is involved in the selection decision itself. Option C (Probe) is not a standard CAPWAP message type relevant to the hot standby negotiation process.

Memory tip: Think of the sequence as "ask, then answer." The AP asks via Discovery Request, and the ACs answer via Discovery Response -- the AP makes its choice based on what it hears in those answers.

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