In a dual-link backup network, what will the AP use to distinguish between the active AC and the standby AC? (Multiple choice)

Question

Options

• APriority
• BThe IP address of the AC
• CAC load condition
• DThe time when the AC responds to the AP

• A
  69% (22)
• D
  31% (10)

Explanation

In a dual-link backup network, an AP maintains simultaneous CAPWAP tunnels to both an active AC and a standby AC. Priority (A) is a directly configured value on each AC - the higher-priority AC is designated active, making it the primary distinguishing factor. IP address (B) uniquely identifies each AC, allowing the AP to track and differentiate the two connections at all times. AC load condition (C) is evaluated so the system can make intelligent failover and selection decisions based on which controller can best handle traffic.

Option D is wrong because response time is not a defined selection criterion in the dual-link backup mechanism - the AP doesn't pick the active AC simply because it replied faster. Selection is based on administratively configured and measurable capacity factors, not race conditions.

Memory tip: Think of the acronym PIL - Priority, IP address, Load. These are the three objective, configurable parameters the AP uses to know which AC is in charge, as opposed to transient network behaviors like response latency.

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