Cisco인증 642-642시험은 빨리 패스해야 되는데 어디서부터 어떻게 시험준비를 시작해야 하는지 갈피를 잡을수 없는 분들은ITExamDump가 도와드립니다. ITExamDump의 Cisco인증 642-642덤프만 공부하면 시험패스에 자신이 생겨 불안한 상태에서 벗어날수 있습니다.덤프는 시장에서 가장 최신버전이기에 최신 시험문제의 모든 시험범위와 시험유형을 커버하여Cisco인증 642-642시험을 쉽게 패스하여 자격증을 취득하여 찬란한 미래에 더 가깝도록 도와드립니다.
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지금 같은 상황에서 몇년간Cisco 642-642시험자격증만 소지한다면 일상생활에서많은 도움이 될것입니다. 하지만 문제는 어떻게Cisco 642-642시험을 간단하게 많은 공을 들이지 않고 시험을 패스할것인가이다? 우리ITExamDump는 여러분의 이러한 문제들을 언제드지 해결해드리겠습니다. 우리의642-642시험마스터방법은 바로IT전문가들이제공한 시험관련 최신연구자료들입니다. 우리ITExamDump 여러분은642-642시험관련 최신버전자료들을 얻을 수 있습니다. ITExamDump을 선택함으로써 여러분은 성공도 선택한것이라고 볼수 있습니다.
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시험 번호/코드: 642-642
시험 이름: Cisco (Quality of Service (QoS))
ITExamDump이 바로 아주 좋은Cisco 642-642인증시험덤프를 제공할 수 있는 사이트입니다. ITExamDump 의 덤프자료는 IT관련지식이 없는 혹은 적은 분들이 고난의도인Cisco 642-642인증시험을 패스할 수 있습니다. 만약ITExamDump에서 제공하는Cisco 642-642인증시험덤프를 장바구니에 넣는다면 여러분은 많은 시간과 정신력을 절약하실 수 있습니다. 우리ITExamDump 의Cisco 642-642인증시험덤프는 ITExamDump전문적으로Cisco 642-642인증시험대비로 만들어진 최고의 자료입니다.
642-642 덤프무료샘플다운로드하기: http://www.itexamdump.com/642-642.html
NO.1 Refer to the exhibit.
Which three statements are true about the configuration.? (Choose three.)
class-map class-1
match ip rtp 2024 1000
class-map class 2
match dscp 5 6 7
policy-map access-group-1-traffic
class class-1
shape peak 16000
class class-2
police 8000 1000
conform-action set-dscp-transmit 1
exceed-action set-dscp-transmit 0
violate-action drop
class class-default
fair-queue 16
queue-limit 20
interface fastethernet 0/0
service-policy output access-group1-traffic
A. Traffic that is subject to shaping can burst up to 32,000 bps.
B. IP traffic (DSCPs 5, 6, and 7) that is sent on fastethernet 0/0 will be traffic policed.
C. RTP traffic (ports 2024 and 1000) that is sent on fastethernet 0/0 will be traffic shaped.
D. Traffic that is subject to policing will have the DCSP set to 0 if the rate exceeds 1000 bps.
E. IP traffic (DSCPs 1, 2, 3, and 4) that is sent on fastethernet 0/0 are considered to have a violate status
and are dropped.
F. IP traffic (DSCP 0) that is sent on fastethernet 0/0 will be subject to fair queuing.
Answer: ABF
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NO.2 Based on the following 2950 switch configurations, which statement is correct?
no wrr-queue cos-map
wrr-queue bandwidth 20 10 70 1
wrr-queue cos-map 4 5
wrr-queue cos-map 1 0 1 2 3
wrr-queue cos-map 3 6 7
A. Queue 1 is setup as the expedite queue.
B. Queue 2 is setup as the expedite queue.
C. Queue 3 is setup as the expedite queue.
D. Queue 4 is setup as the expedite queue.
E. No queue is setup as the expedite queue.
Answer: E
Cisco인증 642-642 642-642최신덤프
NO.3 The following commands have been configured under the fa0/1 interface on the 2950 switch:
wrr-queue bandwidth 20 1 80 0
mls qos trust cos
mls qos trust device cisco-phone
Voice traffic from the IP phone that is directly connected to the fa0/1 interface is experiencing excessive
delays.
What could be the cause of this problem?
A. The wrr-queue bandwidth weightings are not correct.
B. The default wrr-queue cos-map is being used.
C. The default cos-to-dscp map is being used.
D. The default dscp-to-cos map is being used.
E. The trust boundary configuration is not correct.
Answer: B
Cisco자료 642-642 642-642시험문제
NO.4 Answer:
NO.5 Which two commands are typically applied to the voice traffic class within a policy-map? (Choose two.)
A. shape peak {bps}
B. priority {kbps}
C. bandwidth {kbps}
D. compress header ip rtp
E. random-detect ecn
F. random-detect dscp-based
Answer: BD
Cisco인증 642-642 dump 642-642인증 642-642 642-642기출문제
NO.6 In which two locations is the qos pre-classify command applied to support QoS preclassification over an
IPSec/GRE tunnel? (Choose two.)
A. the tunnel interface
B. the physical interface
C. the crypto map
D. the policy-map
E. the class-map
Answer: AC
Cisco 642-642기출문제 642-642 dump 642-642
NO.7 What does the following command accomplish?
router(config-pmap-c)# shape fecn-adapt
A. enables the router to lower the shaping rate when BECN bits are received
B. enables the router to lower the shaping rate when FECN bits are received
C. enables the router to respond to FECN bits by creating test frames in the opposite direction with the
BECN bit set
D. enables the router to respond to BECN bits by creating test frames in the opposite direction with the
FECN bit set
E. enables the router to increase the shaping rate when BECN bits are received
F. enables the router to increase the shaping rate when FECN bits are received
Answer: C
Cisco 642-642 642-642인증 642-642 642-642 pdf
NO.8 Answer:
NO.9 What is the purpose of the qos pre-classify command?
A. to enable the IOS to copy the ToS field from the original IP header to the outer tunnel IP header
B. to enable the IOS to copy the ToS field from the outer tunnel IP header back into the original IP header
C. to enable the IOS to classify the packet based on the original IP header instead of the tunnel IP header
D. to enable the IOS to classify the packet based on the outer tunnel IP header instead of the original IP
header
E. to enable class-based marking on tunnel interface
F. to enable class-based marking on IPSec crypto maps
Answer: C
Cisco 642-642시험문제 642-642 pdf 642-642 642-642
NO.10 What is the purpose of using multiactions traffic policing?
A. so that exceed traffic can be shaped and violate traffic can be policed
B. so that conform, exceed, and violate traffic can be marked with different CLPs
C. so that conform traffic from different flows can be marked with different DSCPs
D. so that class-based policing can mark at Layer 2 and Layer 3 at the same time
E. so that traffic can be policed using two separate rates
Answer: D
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NO.11 In a managed CE scenario, the customer's network is supporting VoIP and bulk file transfers.
According to the best practices, which QoS mechanisms should be applied on the WAN edge CE-PE
56-kbps Frame Relay link on the CE outbound direction?
A. WRR, FRTS, FRF.12, and CB-RTP header compression
B. WRR, CB-WRED, CB-Marking, FRF.12, and CB-RTP header compression
C. CBWFQ, CB-WRED, CB-Marking, CB-Policing, and FRTS
D. CBWFQ, FRTS, FRF.12, and CB-RTP header compression
E. LLQ, CB-WRED, CB-Marking, FRTS, FRF.12, and CB-RTP header compression
F. LLQ, CB-WRED, CB-Policing, and CB-TCP and CB-RTP header compressions
Answer: E
Cisco 642-642 642-642 642-642
NO.12 Which QoS mechanism calculates the mean queue depth to determine its operation?
A. WRED
B. LLQ/CBWFQ
C. WFQ
D. class-based shaping
E. class-based policing
Answer: A
Cisco pdf 642-642최신덤프 642-642
NO.13 LAB
A. Please click console
Answer:
2950.SWITCH>en
2950-SWITCH#config terminal
2950-SWITCH(config)#int fa0/1
2950-SWITCH(config-if)#mls qos trust dscp
2950-SWITCH(config-if)#exit
2950-SWITCH(config)#int fa0/11
2950-SWITCH(config-if)#mls qos trust cos
2950-SWITCH(config-if)#exit
2950-SWITCH(config)#int fa0/10
2950-SWITCH(config-if)#mls qos trust cos
2950-SWITCH(config-if)#mls qos trust device cisco-phone
2950-SWITCH(config-if)#exit
2950-SWITCH(config)#exit
2950-SWITCH#copy run start
NO.14 In an unmanaged CE router implementation, how does the service provider enforce the SLA?
A. by using class-based policing on the CE to PE link to limit the customer's input rate
B. by marking on the CE to PE link and using CBWFQ and CB-WRED on the PE to P link
C. by marking on the CE to PE link and using class-based policing on the PE to P link
D. by using class-based random discard on the CE to PE link to limit the customer's input rate
Answer: A
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NO.15 Switch port fa0/2 has been configured to connect an IP phone with an attached PC. Given the set of
commands shown below, where does the trust boundary lie?
interface fa0/2
mls qos trust cos
mls qos trust device cisco-phone
switchport voice vlan 112
A. between the IP phone and the switch
B. between the IP phone and the PC
C. between the access layer switch and the distribution layer switch
D. between the PC port and the LAN port on the IP phone
Answer: A
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