Selected Answer: D From Cisco: IPv6 - Destination Guard The Destination Guard feature helps minimize denial-of-service (DoS) attacks. It only performs address resolution for addresses that are active on the link, and it requires the FHS binding table to be filled with the help of the IPv6 snooping feature. This feature allows filtering of IPv6 traffic based on the destination address, and it blocks NDP resolution for destination addresses that are not present in the binding table. By default, the policy drops traffic that arrives for an unknown destination.

the answer is correct -> https://www.cisco.com/c/en/us/td/docs/routers/7600/ios/15S/configuration/guide/7600_15_0s_book/IPv6_Security.html#86114

Selected Answer: D D is correct: https://www.cisco.com/c/en/us/td/docs/routers/7600/ios/15S/configuration/guide/7600_15_0s_book/IPv6_Security.html#:~:text=on%20the%20VLAN.-,IPv6%20%2D%20Destination%20Guard,%2Dservice%20(DoS)%20attacks.