Designing Cisco Enterprise Networks (ENSLD) — Question 296

In PIM sparse mode, if an RPF check is successful on a multicast-enabled device, what happens to the multicast packet?

Answer options

• A. It is forwarded to all interfaces except for the receiving interface.
• B. It is forwarded to all PIM-enabled interfaces.
• C. It is forwarded to all interfaces within the OIL.
• D. Forwarded packets are dropped to prevent looping.

Correct answer: C

Explanation

The correct answer is C because in PIM sparse mode, a multicast packet is forwarded to all interfaces that are in the outgoing interface list (OIL) after a successful RPF check. Options A and B are incorrect as they misrepresent how packets are forwarded in this mode, and option D is wrong because packets are forwarded, not dropped, in this scenario.