Refer to the exhibit. A network operator must stop 10.33.33.33/32 from being redistributed into Level 1 router XR1.
Which configuration meets this need?

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

Refer to the exhibit. An engineer is addressing an IS-IS design issue which is running within the topology.
All links are running on FastEthernet, except the link between R5 and R4, which is Gigabit Ethernet.
Which statement about the design is true?

Refer to the exhibit. After troubleshooting an OSPF adjacency issue, routers 1, 2, and 3 have formed OSPF neighbor relationships.
Which statement about the configuration is true?

For which reason can two BGP peers fail to establish a neighbor relationship?