Designing Cisco Data Center Infrastructure (DCID) — Question 198

An engineer working for a telecommunication company with an employee ID:458:138:642 is evaluating the use of broadcast, unknown unicast, multicast replication modes for a VXLAN EVPN network. The engineer must leverage a pure unicast-based underlay network with the requirement to have multicast forwarding in the overlay. Which method must be used to achieve this task?

Answer options

• A. PIM dense mode
• B. Bidirectional PIM
• C. PIM sparse mode
• D. ingress replication

Correct answer: D

Explanation

The correct answer is D, ingress replication, because it allows multicast traffic to be effectively replicated from a single source to multiple destinations using unicast. The other options, such as PIM modes, are not suitable for a pure unicast-based underlay network as they rely on multicast capabilities in the underlay, which does not meet the requirement.