Latest Cisco CCNP Service Provider 642-889 EXAM QUESTIONS [Dec-2017 Dumps]

Cisco 642-889 exam is very helpful for applicants to identify Network Engineer, Network Security Engineer and Service Provide Specialist. Applicants will also learn how to improve Describe connectivity between an SP and upstream SPs. Applicants, who will clear this 642-889 Cisco Certified Network Professional Service Provider certification exam, will receive CCNP Service Provider certifications. CCNPtips provides you updated 642-889 exam questions for your 642-889 exam preparation.

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 Exam Questions:

Question: 14

When implementing MPLS Layer 3 VPNs with customers running OSPF as the CE-PE routing protocol, the service provider MPLS backbone looks like what to the CE routers?

A. the backbone (Area 0)
B. an external routing domain
C. a superbackbone that is transparent to the CE OSPF routers
D. a transit area (similar to a transit area for supporting virtual links)

Answer: C

Question: 15

When implementing MPLS Layer 3 VPNs with customers running OSPF as the CE-PE routing protocol, which situation will require a sham link to be implemented in the MPLS backbone?

A. to connect customer sites in different OSPF areas
B. to connect customer sites in the same OSPF area
C. to prevent OSPF routing loops when a customer site has redundant CE-PE connections
D. if there is a backdoor link between the CE routers, to ensure that the backdoor link is used only to back up the primary connection through the MPLS VPN

Answer: D

Explanation:
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t8/feature/guide/ospfshmk.html

Question: 16

On Cisco IOS and IOS XE Layer 3 MPLS VPN implementations, when redistributing the customer RIP routes into MP-BGP, the RIP metric is copied into which BGP attribute?

A. local preference
B. weight
C. MED
D. extended community

Answer: C

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Question: 17

Which option is used as a loop prevention mechanism to support MPLS VPN customers with multihomed sites?

A. BGP down bit
B. sham links
C. AS override
D. SOO extended BGP community
E. allow as-in

Answer: D

Question: 18

Refer to the partial Cisco IOS XR PE router configuration exhibit for supporting a Layer 3 MPLS VPN customer using BGP as the CE-to-PE routing protocol.

The service provider AS number is 64500, the customer AS number is 64501, and the customer CE router is 10.1.1.1. What is missing in the configuration?

A. The route distinguisher has not been configured under router bgp 64500 vrf Customer_A.
B. The import and export route targets have not been configured under router bgp 64500 vrf Customer_A.
C. The 10.1.1.1 BGP neighbor has not been activated for IPv4 unicast routing.
D. The 10.1.1.1 BGP neighbor has not been activated for the VPNv4 address family.

Answer: A

Question: 19

Based on the Cisco IOS XR VRF configuration exhibit,

Which two data flows between the MPLS VPNs will be allowed? (Choose two.)

A. The CustomerA central site can communicate with the CustomerB central site.
B. The CustomerA central site can communicate with all CustomerA sites.
C. The CustomerA central site can communicate with all CustomerB sites.
D. The CustomerA sites can communicate with all CustomerB sites.

Answer: A, B

Question: 20

Refer to the partial Cisco IOS XR PE router VRF configuration exhibit.

To implement a central-service VPN supporting both customer1 and customer2, what will be the required corresponding VRF configuration on the central-service-server PE router?

A. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
2:2
export route-target
3:1
2:1
!
B. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
2:1
export route-target
3:1
2:2
!
C. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
1:1
1:2
export route-target
3:1
1:1
1:2
!
D. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
1:1
1:2
2:1
2:2
export route-target
3:1
1:1
1:2
2:1
2:2
!

Answer: A

Question: 21

Which two statements about implementing a separate MPLS VPN to provide customers Internet access are correct? (Choose two.)

A. The Internet gateway router will act as a CE router.
B. Customers will use separate interfaces for VPN and Internet access.
C. Customers are assigned to the Internet VPN.
D. Internet routes will be leaked from the PE global routing table to the customer VRF.

Answer: A, C

Question: 22

Which CE-to-PE routing protocol implements the down bit as a loop prevention mechanism?

A. RIPv2
B. EIGRP
C. IS-IS
D. OSPF
E. BGP

Answer: D