Which two PHY modes are available to implement an IOS XR Gigabit Ethernet interface? (Choose two.)

Refer to the exhibit.

An engineer has started to configure a router for OSPF, as shown Which configuration must an engineer apply on the network so that area 15 traffic from R5 to R1 will prefer the route through R4?

The network-engineering team of a service provider is integrating several recently acquired networks into a more scalable common Unified MPLS architecture. The new network architecture will support end-to-end VPNv4 and VPNv6 services with these requirements:
* The IGP of the core layer is IS-IS In Area 0.
* The IGP of the aggregation layers is OSPF in Area 0.
* The LDP protocol Is used to distribute label bindings within each IGP domain.
Which task must the network engineer perform when implementing this new architecture?

Drag and drop the OSs from the left onto the correct deceptions on the right.

Refer to the exhibit:

Which configuration prevents the OSPF neighbor from establishing?