In an MPLS network, which protocol can be used to distribute a Segment Prefix?

Refer to the exhibit:

Which effect of this configuration is true?

Refer to the exhibit.

Router 4 is added to the network and must be in the same area as router 1. Which NET should the engineer assign?

Refer to the exhibit.

Which configuration must be implemented on router R8 so that it will establish OSPF adjacency with R5?
A)

B)

C)

D)

Refer to the exhibit.

While troubleshooting the OSPF adjacency between routers R1 and R2 an engineer noticed that both routers are stuck in the EXCHANGE/EXSTART state. What should the engineer fix to solve the ongoing issue?