Cisco
352-001 · Question #49
352-001 Question #49: Real Exam Question with Answer & Explanation
The correct answer is A: IPv6 is transparent on Layer 2 switches, so there is no need to make any changes to the Layer 2. Layer 2 switches are transparent to IPv6 by default, but MLD snooping support is needed if IPv6 multicast is deployed.
Question
You are the lead network designer for an enterprise company called ABC, and you are leading design discussions regarding IPv6 implementation into their existing network. A question is raised regarding older Layer 2 switches that exist in the network, and if any changes are required to these Layer 2 switches for successful IPv6 implementation. Which two responses should you give? (Choose two.)
Options
- AIPv6 is transparent on Layer 2 switches, so there is no need to make any changes to the Layer 2
- BIf IPv6 anycast deployment is planned, then make sure that Layer 2 switches support ICMPv6
- CIf IPv6 anycast deployment is planned, then make sure that Layer 2 switches support DHCPv6
- DIf IPv6 multicast deployment is planned, then make sure that Layer 2 switches support MLD snooping
- EIf IPv6 anycast deployment is planned, then make sure that Layer 2 switches support ND snooping
Explanation
Layer 2 switches are transparent to IPv6 by default, but MLD snooping support is needed if IPv6 multicast is deployed.
Common mistakes.
- B. ICMPv6 support at Layer 2 is not a requirement for anycast deployment; anycast addresses are handled at Layer 3 and do not impose special ICMPv6 requirements on Layer 2 switches.
- C. DHCPv6 operates at Layer 3 and above and is unrelated to anycast deployment requirements at Layer 2.
- E. ND snooping is an IPv6 first-hop security feature used to protect against rogue devices, not a requirement specifically for anycast deployment.
Concept tested. IPv6 transparency on Layer 2 and MLD snooping
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