Cisco 642-889 Exam Preparation Questions For Best Result – Updated 2018

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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

When implementing H-VPLS with QinQ access on Cisco Metro Ethernet switches, which two commands enable the QinQ tagging? (Choose two.)

A. encapsulation dot1q {customer-vlan} second-tag {sp-vlan}
B. encapsulation dot1q {sp-vlan} second-tag {customer-vlan}
C. switchport mode dot1q-tunnel
D. switchport mode trunk
E. switchport access vlan {sp-vlan}
F. switchport access vlan {customer-vlan}

Answer: C, E

Question: 22

Implementing H-VPLS instead of VPLS reduces which requirement?

A. having a full mesh of PWs between all the PE routers in the service provider MPLS core
B. having a full mesh of PWs between all the UPE routers
C. having to implement QinQ tagging between the UPE and the NPE
D. having to implement MPLS LDP between the UPE and the NPE
E. the overhead of using BGP or LDP autodiscovery

Answer: A

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

Explanation:
http://www.cisco.com/en/US/docs/ios/12_0st/12_0st14/feature/guide/csc.html

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