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642-889 exam questions, 642-889 PDF dumps; 642-889 exam dumps:: https://www.dumpsschool.com/642-889-exam-dumps.html (76 Q&A) (New Questions Are 100% Available! Also Free Practice Test Software!)

Latest and Most Accurate Cisco 642-889 Dumps Exam Questions and Answers:

Question: 21

What is required on a Cisco IOS XR router to assign an interface to a VRF?

A. Assign the VRF to the interface, and then re-enable Cisco Express Forwarding on the interface.
B. Assign the VRF to the interface, and then reset the CE-to-PE routing protocol process.
C. Shut the interface, assign the VRF to the interface, and then no shut the interface.
D. Remove the IP address configuration on the interface, assign the VRF to the interface, and then reconfigure the IP address on the interface.

Answer: D

Explanation:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.5/mpls/configuration/guide/gc35v3.html#wp1080845

Question: 22

When implementing VPLS on Cisco IOS XR routers, the VPLS PW neighbors can be statically defined under which configuration mode?

A. bridge group
B. bridge-domain
C. vfi
D. mpls ldp
E. l2transport

Answer: C

Question: 23

Which VPN technology uses the Group Domain of Interpretation as the keying protocol and IPsec for encryption that is often deployed over a private MPLS core network?

A. DMVPN
B. GET VPN
C. SSL VPN
D. L2TPv3

Answer: B

Explanation:
http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6635/ps7180/deployment_guide_c07_554713.html

Question: 24

What is the primary difference between 6PE and 6VPE?

A. 6VPE does not require an MPLS core.
B. 6VPE requires an IPv6-aware core.
C. 6VPE provides IPv6 VPN services.
D. 6VPE tunnels IPv6 packets inside IPv4 packets.

Answer: C

Explanation:
6PE is for transporting ipv6 natively and 6VPE is for ipv6 mpls vpns

Question: 25

Refer to the Cisco IOS XR router output exhibit,

which method is being used to transport IPv6 traffic over the service provider network?

A. 6PE
B. 6VPE
C. native IPv6
D. native IPv4
E. dual stack

Answer: B

Explanation:
NOT SURE THIS MATCHES ANSWER

Question: 26

Which flavor of MPLS Layer 3 VPN has MPLS enabled on PE-CE links?

A. basic
B. CSC
C. inter-AS
D. AToM
E. VPLS

Answer: B

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