A Review Of Printable 642-887 exam dumps

Q1. Refer to the partial Cisco IOS XR configurations exhibit for Router 1 and Router 2.

There are two routers that are connected back to back over the Gigabit Ethernet link. If the "show mpls ldp neighbor" command output on Router 1 does not show LDP peering with Router 2, what could be the possible root cause of the LDP peering problem?

A. missing interface under OSPF IGP configuration

B. hello timers mismatch on Router 1 and Router 2

C. password for LDP session mismatch on Router 1 and Router 2

D. MPLS LDP session protection is not configured

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Q2. When configuring LLQ (strict priority queue) on a traffic class using the Cisco IOS XR priority command on a Cisco ASR9K router, which additional QoS command is required for this traffic class?

A. shape

B. police

C. random-detect

D. bandwidth

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Q3. Which three steps are required to configure QPPB on Cisco IOS XR routers? (Choose three.)

A. Apply a QPPB route policy to the BGP process using the table-policy command

B. Apply a QPPB route policy to the BGP neighbor using the route-policy command

C. Define a QPPB route policy to match the customer routes, then set the IP precedence or qos-group

D. Define a QPPB route policy to match the customer IP precedence or qos-group markings, then set the BGP community

E. Enable QPPB on an interface using the ipv4 bgp policy propagation input ip- precedence|qos-group destination|source command

F. Enable QPPB on an interface using the ipv4 bgp policy propagation output ip- precedence|qos-group destination|source command

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Q4. On a Cisco router, when will the router actually reserve the bandwidth for the MPLS traffic engineering tunnel?

A. during the autoroute process

B. during constraint-based routing calculations

C. on the receipt of the RSVP Path message

D. on the receipt of the RSVP Resv message

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Q5. 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?

A. because the Cisco IOS XR router does not have the correct software packages installed

B. because when defining the class-map, the class-map type should be set to type inspect: class-map type inspect class-map-name command

C. because NBAR is not supported on the Cisco IOS XR

D. because flexible packet matching has not been enabled on the Cisco IOS XR router

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Q6. DS-TE implementations on Cisco routers support which bandwidth pool(s) and class type(s)? (Choose two.)

A. global pool only

B. subpool only

C. global pool and subpool

D. class-type 0 only

E. class-type 1 only

F. class-type 0 and class-type 1

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Q7. Which three mechanisms are used to implement MPLS TE? (Choose three.)

A. tunnel interface

B. CSPF

C. RSVP

D. LDP

E. MP-BGP

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Q8. Only based on the Cisco IOS XR policy-map configuration exhibit,

which statement is correct?

A. All DSCP AF41 marked packets will be dropped when the average queue length reaches 12,000 packets.

B. DSCP AF11 marked packets will be randomly dropped when the average queue length reaches 10,000 packets.

C. DSCP AF11 and AF41 marked packets are guaranteed a minimum bandwidth of 1 Mb/s.

D. DSCP AF11 and AF41 marked packets are guaranteed a maximum bandwidth of 1 Mb/s.

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Q9. A DSCP value of 41 in decimal corresponds to which IP precedence value?

A. 3 – Flash

B. 4 – Flash Override

C. 5 – Critical

D. 6 – Internet Control

E. 7 – Network Control

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Q10. What is the correct formula for determining the CIR?

A. CIR = Bc/Tc

B. CIR = Bc x Tc

C. CIR = Tc/Bc

D. CIR = Bc + Be

E. CIR = Tc/(Bc+Be)

F. CIR = (Bc+Be)/Tc

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