The multicast destination address of the VRRP message is?

Question

Options

• A224.0.1.18
• B224.0.0.18
• C224.0.0.20
• D224.0.0.21

• A
  8% (5)
• B
  78% (51)
• C
  11% (7)
• D
  3% (2)

Explanation

224.0.0.18 is the IANA-assigned link-local multicast address for VRRP (Virtual Router Redundancy Protocol), as specified in RFC 3768 and RFC 5798. All VRRP routers in a group listen on this address to exchange advertisement messages and elect the Master router.

Why the distractors are wrong:

• A (224.0.1.18) uses the 224.0.1.x range, which is globally-scoped multicast - VRRP uses link-local scope (224.0.0.x), so this is a scope-level trap.
• C (224.0.0.20) and D (224.0.0.21) are not assigned to any major redundancy or routing protocol; they are plausible-looking but incorrect values designed to test whether you've memorized the exact address.

Memory tip: Associate VRRP with 18 by thinking "VRRP keeps your gateway alive - and 18 is the age you become independent." Alternatively, group it with similar protocols: HSRP v1 uses 224.0.0.2, EIGRP uses 224.0.0.10, and VRRP uses 224.0.0.18 - each is a distinct, memorized value in the 224.0.0.x link-local block.

No community discussion yet for this question.