Which of the following description of the VRRP master device is wrong?

Question

Options

• APeriodically send VRRP packets
• BEven if the router is already the Master, it will be preempted by the priority Backup router
• CForward IP packets whose destination MAC address is the virtual MAC address
• DRespond to the ARP request for the virtual IP address with the virtual MAC address

• A
  3% (1)
• B
  11% (4)
• C
  82% (31)
• D
  5% (2)

Explanation

Option C is the wrong description because, while hosts do send frames to the VRRP Master with the virtual MAC as the destination MAC (Layer 2 delivery), the Master performs IP routing (Layer 3) to actually forward those packets - it re-frames them with a new destination MAC (the next-hop or end-host MAC). Saying the Master "forwards IP packets whose destination MAC is the virtual MAC" conflates how frames arrive at the Master with how the Master forwards them; the outgoing forwarded frame will never have the virtual MAC as its destination.

• A is correct - The Master periodically sends VRRP Advertisement packets to signal it's alive and in charge.
• B is correct - Preemption is standard VRRP behavior; a Backup with higher priority will reclaim the Master role when it comes online or recovers.
• D is correct - The Master responds to ARP requests for the virtual IP by returning the virtual MAC, which is the core mechanism that routes host traffic through the virtual router.

Memory tip: Think "the virtual MAC is a doorbell, not a destination" - it tells frames how to ring the Master's door (Layer 2 delivery), but once inside, the Master routes by IP (Layer 3), swapping the MAC label before forwarding onward.

No community discussion yet for this question.