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300-420 · Question #47
300-420 Question #47: Real Exam Question with Answer & Explanation
The correct answer is D: It can use an interface IP address as the virtual IP address.. VRRP supports using an interface's IP address as the virtual IP address and sends its advertisement messages to the multicast address 224.0.0.18.
Advanced Enterprise Campus Networks
Question
Which two statements about VRRP are true? (Choose two.)
Options
- AAuthentication commands must be entered under the interface.
- BIt sends advertisements to multicast address 224.0.0.9.
- CIt supports MD5 and IP sec authentication.
- DIt can use an interface IP address as the virtual IP address.
- EIt sends advertisements to multicast address 224.0.0.18.
- FIt is a Cisco proprietary protocol.
Explanation
VRRP supports using an interface's IP address as the virtual IP address and sends its advertisement messages to the multicast address 224.0.0.18.
Common mistakes.
- A. While authentication commands are typically configured within the interface context, they are often specific to the VRRP group, making this statement too generalized to be universally true.
- B. The multicast address 224.0.0.9 is used by RIP version 2, not by VRRP for its advertisements.
- C. VRRP supports MD5 authentication but does not natively support IPsec authentication for its control plane messages.
- F. VRRP (Virtual Router Redundancy Protocol) is an open-standard protocol defined by RFC 3768 and RFC 5798, not a Cisco proprietary protocol.
Concept tested. VRRP characteristics and operation
Topics
#VRRP#First Hop Redundancy Protocols#Network Redundancy#Multicast Addressing
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