Free 642-887 Exam Questions Free Download – [Feb-2018 Dumps]

By | February 6, 2018

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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 option is the appropriate way to configure a color-aware, dual-rate policer together with a color-blind, single-rate policer for the rest of the traffic?

A. class-map match-all CLASS1
match dscp af31
class-map match all CLASS2
match dscp af32
class-map match-all CLASS3
match dscp ef
policy-map POLICY1
class CLASS1
police rate 100000 peak-rate 200000
conform-color CLASS2 exceed-color CLASS3
conform-action set-dscp-transmit af11
exceed-action set-dscp-transmit af21
violate-action set-dscp-transmit af23
B. class-map match-all CLASS 1
match dscp af31
class-map match-all CLASS2
match dscp af32
class-map match-all CLASS3
match dscp af33
policy-map POLICY1
class CLASS1
police rate 100000 burst 31250
conform-color CLASS2 exceed-color CLASS3
conform-action set-dscp-transmit af11
exceed-action set-dscp-transmit af21
violate-action set-dscp-transmit af23
C. class-map match-all CLASS 1
match dscp af31 af32 af33
class-map match-all CLASS2
match dscp af32
class-map match-all CLASS3
match dscp af33
policy-map POLICY1
class CLASS1
police rate 100000 burst 31250
conform-color CLASS2 exceed-color CLASS3
conform-action set-dscp-transmit af31
exceed-action set-dscp-transmit af32
violate-action set-dscp-transmit af33
class class-default
police rate percent 10 peak-rate percent 30
D. class-map match-all CLASS 1
match dscp af31 af32 af33
class-map match-all CLASS2
match dscp af32
class-map match-all CLASS3
match dscp af33
policy-map POLICY1
class CLASS1
police rate 100000 peak-rate 200000
conform-color CLASS2 exceed-color CLASS3
conform-action set-dscp-transmit af31
exceed-action set-dscp-transmit af32
violate-action set-dscp-transmit af33
class class-default
police rate percent 10 peak-rate percent 30
E: class-map match-all CLASS 1
match dscp af31 af32 af33
class-map match-all CLASS2
match dscp af32
class-map match-all CLASS3
match dscp af33
policy-map POLICY1
class CLASS1
police rate 100000 peak-rate 200000
conform-color CLASS2 exceed-color CLASS3
conform-action set-dscp-transmit af31
exceed-action set-dscp-transmit af32
violate-action set-dscp-transmit af33
class class-default
police rate 10000

Answer: E

Question: 22

Which two traffic types are recognized by NBAR default configuration settings? (Choose two.)

A. HTTP URL
B. Sun RPC
C. TCP
D. UDP
E. HTTPS URL

Answer: A, B

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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