Ourexam 642-889 Exam Questions and Answers

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Exam : 642-889
Title
: I
m
p lementing Cisco Service
Provider Next-Generation
Egde Network Services
Version : DEMO
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1.Which type of VPN requires a full mesh of virtual circuits to provide optimal site-to-site connectivity?
A. MPLS Layer 3 VPNs
B. Layer 2 overlay VPNs
C. GET VPNs
D. peer-to-peer VPNs
Answer: B
2.Which three Layer 3 VPN technologies are based on the overlay model? (Choose three.)
A. ATM virtual circuits
B. Frame Relay virtual circuits
C. GRE/IPsec
D. L2TPv3
E. MPLS Layer 3 VPNs
F. DMVPNs
Answer: C,D,F
3.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
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4.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
5.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
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E. dual stack
Answer: B
6.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
7.Which MP-BGP address family must be configured to use VPLS autodiscovery in a Cisco IOS XR
router?
A. address-family l2vpn vpls-vpws
B. address-family vpnv4 unicast
C. address-family ipv4 mdt
D. address-family ipv4 tunnel
E. address-family vpls vfi
Answer: A
8.In MPLS Layer 3 VPN implementations, what is used on the PE router to isolate potential overlapping
routing information between different customers?
A. route targets
B. VRFs
C. VC IDs
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D. pseudowire IDs
E. pseudowire classes
Answer: B
9.Within the service provider IP/MPLS core network, what must be implemented to enable Layer 3 MPLS
VPN services?
A. IS-IS or OSPF on all the PE and P routers
B. MP-BGP between the PE routers
C. RSVP on all the PE and P routers
D. targeted LDP between the PE routers
E. LDP between the CE and PE routers
Answer: B
10.In MPLS Layer 3 VPN implementations, which mechanism is used to control which routes are
imported to a VRF?
A. RT
B. RD
C. VC ID
D. PW ID
E. VRF ID
Answer: A
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