Cisco 642-889 Exam Question to Pass Early

This CCNP Service Provider Certification exam tests skills to Implement Cisco Service Provider Next-Generation Edge Network Services.

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Question No. 1

When implementing a Layer 2 transport subinterface on a Cisco IOS XR router, which encapsulation option is used to match any packets that are not matched by any other service instances?

Answer: A

Question No. 2

An engineer is configuring an EoMPLS circuit on a Cisco IOS XR router interface that removes a VLAN from the distribution layer. Which configuration accomplishes this configuration?

Answer: C

Question No. 3

A customer is concerned about the rapid increase of the AToM VPN solution required to interconnect branch offices in remote locations. They are using Ethernet. PPP. and Frame Relay on the CE-PE segment.

Which statement describes the main concern of moving to a VPLS solution?

Answer: D

Question No. 4

You use the following configuration to configure AToM. using Ethernet on a router and requiring an edge MTU of 1500 bytes on the pseudowire interface:

Which core MTU is required on the P and PE routers to support this configuration?

Answer: C

Question No. 5

A network architect is responsible for maintaining a service provider infrastructure, keeping it up to date and fully functional. Which two statements justify an upgrade to an overlay VPN model? (Choose two.)

Answer: C, D

Question No. 6

Which Layer 2 VPN technology is implemented over an IP core network without the need for MPLS?

Answer: D

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gtl2tpv3.html#wp1040784

The Layer 2 Tunnel Protocol Version 3 feature expands on Cisco support of the Layer 2 Tunnel Protocol Version 3 (L2TPv3). L2TPv3 is an Internet Engineering Task Force (IETF) l2tpext working group draft that provides several enhancements to L2TP for the capability to tunnel any Layer 2 payload over L2TP.

Specifically, L2TPv3 defines the L2TP protocol for tunneling Layer 2 payloads over an IP core network using Layer 2 virtual private networks (VPNs). Benefits of this feature include the following:

*L2TPv3 simplifies deployment of VPNs

*L2TPv3 does not require Multiprotocol Label Switching

*L2TPv3 supports Layer 2 tunneling over IP for any payload

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