Cisco Enterprise Network Core Technologies (ENCOR) Practice Exam

PIM Sparse Mode, PIM Source Specific Multicast, and PIM Dense Mode are established modes used in the Protocol Independent Multicast (PIM) for multicast routing.

PIM Sparse Mode allows efficient distribution of multicast traffic to a group of receivers that are sparsely located across the network. In this mode, multicast routing is based on the concept of shared trees and uses a Rendezvous Point (RP) as the central point for the multicast group, enabling receivers to join the multicast group through the RP.

PIM Dense Mode functions differently by initially assuming that all nodes want to receive the multicast traffic. It floods the multicast traffic throughout the network and then prunes back the nodes that do not want to participate, creating an efficient distribution for scenarios where the receivers are densely located.

PIM Source Specific Multicast serves a specific use case where the multicast traffic is sourced from one specific sender. This allows for finer control of multicast traffic distribution, particularly beneficial in scenarios that require specific sender-receiver relationships.

In contrast, PIM Local Mode is not recognized as an official mode of operation within PIM specifications. It does not contribute to multicast routing in the same way as the other three established modes. Thus, identifying it as the option that is not