Which two statements about the function of PIM designated router are true? (Choose two.)

The PIM DR on a segment where a multicast source is active is responsible for encapsulating the source's multicast traffic in PIM Register messages and sending them to the Rendezvous Point (RP). This process initiates the Shortest Path Tree (SPT) from the source to the RP.

PIM Assert messages are sent when multiple routers on a segment are forwarding the same multicast traffic, to elect a single forwarder. This is a general PIM function, not a specific, unique function of the PIM DR.

On a segment with directly connected multicast receivers, the PIM DR is responsible for sending PIM Join messages towards the Rendezvous Point (RP) to establish the Shared Tree (RPT) or towards the source to establish the Shortest Path Tree (SPT) for those receivers.

While the PIM DR might eventually forward multicast traffic if it wins an assert election or is on the SPT/RPT, its fundamental *function* as a DR is not to forward but to facilitate tree building through registration and join messages.

While the PIM DR typically acts as the IGMP querier, sending IGMP queries is an IGMP-specific function rather than a core PIM-SM tree-building function of the DR.