As shown in the figure, R1 and R2 form a VRRP backup group with VRID 12. Now the user starts R1 one minute after R2 starts. So which of the following descriptions of the default status of R1 are…

Question

Options

• AAfter R1 starts stably, the final master device is R2.
• BIf you change the priority of R2 to 100 and then start it, the final master device will be R1.
• CAfter R1 starts stably, the final Master device is R1.
• DIf you change the priority of R1 to 100 and then start it, the final master device will be R2.
• EAfter R2 starts stably, the final master device is R2.

• A
  10% (3)
• B
  7% (2)
• C
  80% (24)
• E
  3% (1)

Explanation

In VRRP, the router with the higher priority becomes Master, and preemption is enabled by default - meaning a higher-priority router that comes online later will displace the current Master. Based on the figure, R1 has a higher configured priority than R2; even though R2 started first and held the Master role temporarily, R1 preempts it upon joining, making C correct. D is correct because reducing R1's priority to 100 (equal to R2's) eliminates the preemption advantage - with tied priorities, the already-established Master (R2, which started first) retains its role.

Why the distractors fail:

• A reverses the outcome - R1's higher priority means R1, not R2, wins the preemption race.
• B is a trap: changing R2 to 100 is either a no-op (R2 already has 100) or still leaves R1 with the higher priority, so R1 remains Master regardless - B's "change" doesn't create a distinct scenario.
• E mistakes R2's temporary initial state (it is briefly Master before R1 joins) for the final stable state; once R1 comes online with higher priority, that changes.

Memory tip: Think of VRRP like a throne - higher number = first claim to the throne (preemption enabled), but equal claimants = whoever sat down first keeps it (no displacement on a tie).

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