Cisco 640-878 Valid Questions Answers

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Question No. 1

On Cisco IOS XR software, which two of the address-family command options in IS-IS configuration mode are valid? (Choose two)

Answer: B, C

To enter address family configuration mode for configuring Intermediate System-to-Intermediate

System (IS-IS) routing that use standard IP Version 4 (IPv4) and IP Version 6 (IPv6) address prefixes, use the address-family command in router configuration or interface configuration mode. To disable support for an address family, use the no form of this command. Address family {ipv4 | ipv6} {unicast | mulitcast} no address-family {ipv4 | ipv6} {unicast | multicast}

Question No. 2

Refer to the partial Cisco IOS XR BGP configuration exhibit.

Which two statements are true? (Choose two)

Answer: A, C

Question No. 3

What do both Carrier Grade NAT and NAT64 have in common?

Answer: D

Question No. 4

Within an MPLS domain, which table is used by the ingress edge LSR to make forwarding decisions when an unlabeled IP packet is received?

Answer: A

Question No. 5

What command will install the image needed on the Cisco IOS-XR if the SSH configuration options are unavailable?

Answer: A

Question No. 6

A network administrator is troubleshooting an issue whereupon they able to ping the web server, but unable to web browse to the same web server. When the administrator telnets to the webserver on port 80, the administrator gets a connection refused message. At which three layers of the OSI model does the problem exist? (Choose three.)

Answer: D, E, G

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