Refer to the exhibit. Router 1 is a core ABR in a Cisco Unified MPLS environment. All of the router 1 BGP peers are established, but traffic between customers is failing.
Which BGP configuration must be added to the configuration?

Refer to the exhibit.

Which tree does multicast traffic follow?

A network engineer is troubleshooting OSPF multiare A.
Which Cisco IOS XR feature should the engineer use in order to streamline OSPF issue?

For which reason can two devices fail to establish an OSPF neighbor relationship?

Refer to the exhibit.

Routers R1, R2. R3, and R4 have been configured to run OSPF. and router R5 is running EIGRP Traffic from R1 to R5 is expected to pass via R4. but OSPF routing has calculated the best path via R3. Which action corrects the problem?