Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 192

What is a function of IPv6 Source Guard?

Answer options

• A. It inspects ND and DHCP packets to build an address binding table.
• B. It works with address glean or ND to find existing addresses.
• C. It notifies the ND protocol to inform hosts if the traffic is denied by it.
• D. It denies traffic from known sources and allocated addresses.

Correct answer: B

Explanation

The correct answer is B because IPv6 Source Guard utilizes address glean and Neighbor Discovery (ND) to identify addresses already in use. Option A is incorrect as it describes a different function not specific to Source Guard. Option C is also incorrect because Source Guard does not notify hosts about denied traffic in that manner, and Option D misrepresents the function, as it does not solely focus on blocking known sources.