300-420 · Question #22
What is a benefit of using VRRPv3 as compared to VRRPv2?
The correct answer is A. VRRPv3 supports IPv4 and IPv6. VRRPv3 (RFC 5798) (A) extended the original VRRPv2 protocol to support both IPv4 and IPv6 address families, whereas VRRPv2 (RFC 3768) supports only IPv4. This makes VRRPv3 the required choice in dual-stack or IPv6-only environments. Authentication (B) was present in VRRPv2 but…
Question
What is a benefit of using VRRPv3 as compared to VRRPv2?
Options
- AVRRPv3 supports IPv4 and IPv6
- BVRRPv3 supports authentication
- CVRRPv3 supports preemption
- DVRRPv3 supports stateful switchover
How the community answered
(27 responses)- A89% (24)
- B4% (1)
- C7% (2)
Explanation
VRRPv3 (RFC 5798) (A) extended the original VRRPv2 protocol to support both IPv4 and IPv6 address families, whereas VRRPv2 (RFC 3768) supports only IPv4. This makes VRRPv3 the required choice in dual-stack or IPv6-only environments. Authentication (B) was present in VRRPv2 but was actually removed from VRRPv3 (the RFC notes it provides minimal security value and IPsec should be used instead), so this is not a VRRPv3 advantage. Preemption (C) exists in both versions, so it is not a differentiator. Stateful switchover (D) is a separate HA mechanism (SSO) independent of the VRRP version.
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