Which of the following statements about WLAN hot backup is wrong?

Question

Options

• AWhen configuring VRRP hot backup, you can determine the priority of the AC device by
• BWhen configuring VRRP hot standby, the active and standby ACs must be in the same layer 2
• CDuring dual-link hot standby, the active and standby ACs can be in different Layer 2 networks for
• DDuring dual-link hot standby, the backup of load sharing can be realized by configuring the

• A
  3% (1)
• B
  3% (1)
• C
  83% (25)
• D
  10% (3)

Explanation

Option C is the false statement because, like VRRP-based hot standby, dual-link hot standby also requires the active and standby ACs to reside within the same Layer 2 network. The ACs must maintain direct state synchronization, which depends on L2 adjacency - placing them in different L2 domains breaks this requirement.

Why the distractors are correct (and therefore not the answer):

• A is true: VRRP hot backup does use a configurable priority value (typically 0–255) to elect the active AC - higher priority wins master status.
• B is true: VRRP inherently relies on multicast/broadcast for hello and election messages, which cannot cross L3 boundaries, so same-L2 placement is a genuine VRRP requirement.
• D is true: Dual-link hot standby supports load-sharing backup, where APs are divided between both ACs during normal operation, with each serving as the other's failover.

Memory tip: The trap in this question is assuming dual-link hot standby is more flexible than VRRP regarding network topology - it isn't. Think: "Both hot standby modes = same L2, no exceptions." If you see a choice claiming dual-link hot standby relaxes the L2 requirement, flag it as suspect.

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