Cisco 642-889 Exam Preparation Material

Question No. 1

A regional operations center needs to deliver L3VPNs for a very large customer and needs a better understanding of what is necessary to implement an

MPLS L3VPN. What is the biggest advantage to using the MPLS VPN model instead of the peer-to-peer model?

• A. The rviPLS VPN model does not require an ACL to filter undesired traffic.
• B. Security is easier because of newer features for controlling route distribution on CE routers.
• C. IP private addressing is not precluded after implementing VRF instances.
• D. Except for Frame Relay as CE-to-PE data link encapsulation. the intelligence and control of a VPN no longer resides on the CE routers.

Question No. 2

Which aspect of provider tunnel ports do you need to consider when configuring Q-in-Q tunneling to support customer VLANs?

• A. Tunnel ports support DTP.
• B. Tunnel ports support IP ACLs.
• C. Tunnel ports do not support SVP.
• D. Tunnel ports cannot be routed.

Question No. 3

Refer to the exhibit.

XR2 must be configured with OSPF sham-link to PE1. Which configuration achieves this goal?

• A. router ospf 100
• B. router ospf 100
• C. router ospf 100
• D. router ospf 100

Question No. 4

Which option describes what differentiates a U-PE from N-PE?

• A. U-PE has all BGP routes from different BGP AFIs.
• B. N-PE has VRF configured and exported via BGP.
• C. U-PE is configured to peer BGP with all other BGP neighbors.
• D. N-PE is used to physically connect customer edge routers.

Question No. 5

In which mode must AToM be configured when you configure Frame Relay to AAL5?

• A. bridge.
• B. routed
• C. Ethernet
• D. ip

Question No. 6

A Cisco IOS XR device is acting as a PE. It must have an iBGP VPNv4 session with the other PE 2.2.2.2 using source loopback 0. Which configuration achieves this goal?

• A. Option
• B. Option
• C. Option
• D. Option