Cisco 642-887 Exam PDF Study Guide

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Question No. 1

Which field in the MPLS shim header is used to support different QoS markings?

Answer: C

MPLS EXP Marking

The three MPLS EXP (experimental) bits in the shim header of an input or output MPLS packet header may be set or changed by a user configured value

Question No. 2

On the Cisco IOS XR, when using the match protocol command within a class-map to classify traffic, you noticed that the match protocol option on the Cisco IOS XR shows much fewer protocol options than on the Cisco IOS or IOS XE, like there is no option such as the match protocol yahoo-messenger command on the Cisco IOS XR. Why is this?

Answer: C

Question No. 3

Layer 2 VPN services that are offered by traditional service providers using a SONET/SDH backbone can be implemented by service providers using an IP/MPLS backbone with which MPLS feature?

Answer: B

Question No. 4

LDP session protection uses which one to maintain the LDP session between LDP neighbors?

Answer: C

Question No. 5

Referring to the traceroute output exhibit that is shown,

which statement is correct?

Answer: C

Question No. 6

Which option shows how a network engineer implements QPPB marking of incoming traffic on a router that is connected to a VoIP SP (AS62000, BGP community 60000:1) and to a data services service provider (AS61000, BGP community 61000:1) on Cisco IOS XE?

Answer: C

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