Which statement about BFD on Cisco IOS XR Software is true?

• A.Cisco IOS XR router must use LDP to route back to the Cisco IOS router to establish the peer relationship.
• B.Cisco IOS XR Software does not support BFD multihop for IPv4.
• C.Cisco IOS XR router must use dynamic routing or a static route back to the Cisco IOS router to establish the peer relationship.
• D.BFD is not compatible between Cisco IOS XR and Cisco IOS Software.

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

• A.routing process enabled by default on all interfaces
• B.hierarchical CLI
• C.DR support for topology management
• D.show lp ospf topology command

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Refer to the exhibit. The extension header of the IPv6 header is ignored when which value is equal to zero?

• A.Segments Left
• B.Hdr Ext Len
• C.Routing Type
• D.Next Header

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Refer to the exhibit.

Router 1 is connected to router 2 on interface TenGigE0/1. Which interface provides the alternate path to 172.16.200.9/32 when the link between router 1 and router 2 goes down?

• A.A backup path must be statically installed
• B.TenGigE0/1 interface provides the alternate path
• C.TenGigE0/2 interface provides the alternate path
• D.A primary path must be manually installed

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Which two differences should be considered when deciding whether to implement to implement routing policies or route maps? (Choose two.)

• A.Sequences are added after implementing a route map, but routing policies must be reconfigured when change is needed.
• B.Route maps require an explicit deny at the end of the sequence, but routing policies have an implicit deny at the end of the program.
• C.Route maps are supported in Cisco 10S Software and routing policies are supported in Cisco IOS XR Software.
• D.Route maps are implemented using hierarchical policies, but routing policies must be implemented sequentially.
• E.Route policies require sequence numbers, but route maps are implemented without sequencing.

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