Cisco 642-883 Brain Dumps To Prepare Well

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Question No. 1

A network has four routers running IS-IS with the NET addresses below:

R1 — 49.1234.1111.1111.1111.00

R2 — 49.1234.2222.2222.2222.00

R3 – 49.4321.1111.1111.1111.00

R4 – 49.4321.2222.2222.2222.00

How can IS-IS authentication be enabled between all routers?

Answer: A

Question No. 2

Which of the following is a characteristic of dual-multihomed connectivity between an enterprise network and the service provider network or networks?

Answer: A

Question No. 3

When implementing OSPF, which type of networks require DR/BDR election?

Answer: B

Question No. 4

When redistributing EIGRP routes into OSPF as type E2 external OSPF routes, what is the default OSPF seed metric?

Answer: E

Question No. 5

Refer to the exhibit.

Which Cisco IOS XR configuration is missing to complete the configuration task of enabling BFD with only the OSPF peer over the gi0/3/0/1 interface in area 0?

Answer: C

bfd fast-detect

To enable Bidirectional Forwarding Detection (BFD) to detect failures in the path between adjacent forwarding engines, use the bfd fast-detect command in the appropriate configuration mode. To return the software to the default state in which BFD is not enabled, use the no form of this command.

bfd fast-detect [disable | ipv4]

no bfd fast-detect

Question No. 6

What are two consequences of having constant link flaps, resulting in the OSPF neighbor adjacencies going up and down repeatedly? (Choose two.)

Answer: B, D

Question No. 7

Refer to the exhibit.

XR4 must be configured to advertise only AS 100 local subnets to AS 10.Which configuration on XR4 achieves this goal?

Answer: C

Question No. 8

A network specialist is working for a large enterprise that has a BGP-enabled multihomed core infrastructure. Recently, the ISP that provides Internet connectivity to the company had to temporarily disable one of the BGP sessions as a result of routers blackholing BGP prefixes in transit. Which option can the specialist use to avoid this incident in the future?

Answer: C

Question No. 9

When using the Cisco IOS-XR show bgp command to examine the BGP table, the Metric value being displayed is used to represent which BGP attribute?

Answer: C

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