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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) · Cisco
Select 2 answers.
This question asks for 2 answers, but our data marks only 1. Compare with the community discussion below for the full answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
BC are correct
B. It denies traffic from unknown sources or unallocated addresses. C. It uses the populated binding table to allow legitimate traffic.
First of all the question asks to choose two. Second of all, as the name indicates the Source Guard feature determines if the source of a traffic is coming from a prefix or address in the binding table. Binding table entries are populated using mechanisms like ND. So saying "It works independent from IPv6 neighbor discovery." is WRONG. So "one" of the two correct answers can not be A.