A network engineer needs to configure multicast in the network.

 In a multicast implementation using multiple multicast groups and PIM routers, the address that provides automatic discovery of the best RP (Rendezvous Point) for each multicast group is 224.0.1.39. This address is used by the Auto-RP feature, which allows for dynamic RP discovery and simplifies the management of multicast groups across the network. References: CCNP Enterprise Wireless Design ENWLSD 300-425 and Implementation ENWLSI 300-430 Official Cert Guide