Cisco Enterprise Network Core Technologies (ENCOR) Practice Exam 2025 - Free ENCOR Practice Questions and Study Guide

PIM, which stands for Protocol Independent Multicast, utilizes a method of group membership reports to facilitate the routing of multicast traffic to receivers that have expressed interest in receiving specific multicast streams. When a device wishes to join a multicast group, it sends an Internet Group Management Protocol (IGMP) report to indicate its membership. This report communicates to the local multicast router that there are interested receivers for a particular multicast group.

Once the router receives the IGMP report, it can then register the multicast group and inform other routers in the network about receivers for this group. This mechanism allows PIM to efficiently manage the distribution of multicast traffic by ensuring that data is only sent to those devices that have indicated they want to receive it, rather than broadcasting it indiscriminately to all nodes. This targeted approach reduces unnecessary traffic on the network and optimizes bandwidth usage.

In contrast, the other methods listed do not align with how PIM manages multicast traffic. Broadcasting to all nodes would flood the network and is inefficient since not all nodes might be interested in the multicast information. Routing table updates primarily pertain to unicast routing protocols and do not specifically address multicast group membership. Client requests do not represent an established method for multicast routing in PIM, as the subscription