Cisco 642-889 Practice Exam Questions

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Question No. 1

Which statement describes the peer-to-peer VPN model?

Answer: D

Question No. 2

Instructions

What type of routing is used between CE7 and PE7?

Answer: E

# show ip route

Question No. 3

An engineer is reviewing the configuration for establishing MP-iBGP sessions between two PE routers (PE-A and PE-B) with the goal of exchanging IPv4 prefixes in a MPLS L3VPN environment. Which configuration output does the engineer use to achieve this goal?

Answer: B

Question No. 4

When using the Cisco EVC software infrastructure, a double-tagged frame with a customer VLAN of 10 and a service provider VLAN of 150 will be best matched by which encapsulation configuration?

Answer: E

Question No. 5

Instructions

On PE7, which three statements are correct regarding the MPLS VPN configurations used to support the connectivity between the CE7 and CE8 sites? (Choose three.)

Answer: B, C, E

# show ip route

show ip vrf

show ip vrf detail

Question No. 6

What are the two AToM interworking modes? (Choose two.)

Answer: A, B

http://www.cisco.com/en/US/docs/ios/ios_xe/mpls/configuration/guide/mp_l2vpn_intrntwkg_xe.html

Interworking is a transforming function that is required to interconnect two heterogeneous attachment circuits (ACs). Several types of interworking functions exist. The function that is used would depend on the type of ACs being used, the type of data being carried, and the level of functionality required. The two main Layer 2 Virtual Private Network (L2VPN) interworking functions supported in Cisco IOS XE software are bridged and routed interworking.

Layer 2 (L2) transport over multiprotocol label switching (MPLS) and IP already exists for like-to-like ACs, such as Ethernet-to-Ethernet or Point-to-Point Protocol (PPP)-to-PPP. L2VPN Interworking builds on this functionality by allowing disparate ACs to be connected. An interworking function facilitates the translation between different L2 encapsulations.

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