Secrets For Passing Cisco 642-887 Exam: Latest Exam Questions 2018

If you want to place yourself in the best positions into the best IT companies, then you need to certify yourself with the most popular Cisco Certified Network Professional Service Provider 642-887 certification exam. BrainDumps2017′ Exam Questions for Cisco Implementing Cisco Service Provider Next-Generation Core Network Services 642-887 exam is prepared by the team of subject matter experts, professionals who have been grooming students for years. We provide you latest 642-887 exam questions that are easy to learn and understandable for everyone. The 642-887 Exam Questions is available in two easy formats, PDF files that you can carry anywhere easily to read.

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642-887 exam questions, 642-887 PDF dumps; 642-887 exam dumps:: https://www.dumpsschool.com/642-887-exam-dumps.html (130 Q&A) (New Questions Are 100% Available! Also Free Practice Test Software!)

Latest and Most Accurate Cisco 642-887 Dumps Exam Questions and Answers:

Question: 21

Which statement describes the QoS behavior between P and PE routers of an MPLS provider network for an L3VPN service?

A. The PE function honors DSCP markings set by the CE.
B. The customer and provider must agree on DSCP classification and traffic priorities.
C. Classification of customer traffic is handled by the P router.
D. The PE function cannot map DSCP markings to MPLS EXP bits.

Answer: B

Question: 22

Which method is used to mark traffic matched by class-map MY_CLASS as Expedited Forwarding?

A. set ip dscp cs7
B. set dscp cs7
C. set dscp 46
D. set dscp 45

Answer: C

Question: 23

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

Answer: C, F

Explanation:
Differential Service Tunnels
Differential Service Traffic Engineering (TE) is an extension of the regular MPLS Traffic Engineering (MPLSTE) feature. Regular TE does not provide bandwidth guarantees to different traffic classes. A single bandwidth pool (global pool) is used in regular TE that is shared by all traffic. In order to support various class of service (CoS), the ability to provide multiple bandwidth pools is required. These bandwidth pools then can be treated differently based on the requirement for the traffic class using that pool.
In RSVP global and subpools reservable bandwidths are configured on a per interface basis to accommodate TE tunnels on the node. Available bandwidth from all configured bandwidth pools is advertised using Interior Gateway Protocol (IGP). RSVP is used to signal the TE tunnel with appropriate bandwidth pool requirements.

Question: 24

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

A. IP precedence
B. DSCP
C. EXP
D. ToS
E. S
F. Label

Answer: C

Explanation:
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: 25

On a Cisco IOS XR router, which mechanism protects the router resources by filtering and policing the packets flows that are destined to the router that is based on defined flow-type rates?

A. LLQ
B. LPTS
C. Committed Access Rate
D. Control Plane Policing
E. Management Plane Protection
F. NetFlow
G: ACL

Answer: B

Explanation:
Local Packet Transport Services (LPTS) maintains tables describing all packet flows destined for the secure domain router (SDR), making sure that packets are delivered to their intended destinations.
The Low Latency Queueing feature brings strict priority queueing to Class-Based Weighted Fair Queueing (CBWFQ).

Question: 26

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

Answer: B

Explanation:
The Low Latency Queueing feature brings strict priority queueing to Class-Based Weighted Fair Queueing (CBWFQ).

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