ITExamDump의 도움을 받겠다고 하면 우리는 무조건 최선을 다하여 한번에 패스하도록 도와드릴 것입니다. 또한 일년무료 업뎃서비스를 제공합니다. 중요한 건 덤프가 갱신이 되면 또 갱신버전도 여러분 메일로 보내드립니다. 망설이지 마십시오. 우리를 선택하는 동시에 여러분은642-642시험고민을 하시지 않으셔도 됩니다.빨리 우리덤프를 장바구니에 넣으시죠.
ITExamDump의 Cisco인증 642-642덤프를 선택하여Cisco인증 642-642시험공부를 하는건 제일 현명한 선택입니다. 시험에서 떨어지면 덤프비용 전액을 환불처리해드리고Cisco인증 642-642시험이 바뀌면 덤프도 업데이트하여 고객님께 최신버전을 발송해드립니다. Cisco인증 642-642덤프뿐만아니라 IT인증시험에 관한 모든 덤프를 제공해드립니다.
ITExamDump의Cisco인증 642-642덤프를 공부하시면 한방에 시험을 패스하는건 문제가 아닙니다. ITExamDump의Cisco인증 642-642덤프는 시험적중율 최고의 인지도를 넓히 알리고 있습니다.저희가 제공한 시험예상문제로 시험에 도전해보지 않으실래요? Cisco인증 642-642덤프를 선택하시면 성공의 지름길이 눈앞에 다가옵니다.
시험 번호/코드: 642-642
시험 이름: Cisco (Quality of Service (QoS))
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일년동안 무료 업데이트
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Q&A: 87 문항
업데이트: 2014-04-23
우리 ITExamDump 에는 최신의Cisco 642-642학습가이드가 있습니다. ITExamDump의 부지런한 IT전문가들이 자기만의 지식과 끊임없는 노력과 경험으로 최고의Cisco 642-642합습자료로Cisco 642-642인증시험을 응시하실 수 있습니다.Cisco 642-642인증시험은 IT업계에서의 비중은 아주 큽니다. 시험신청하시는분들도 많아지고 또 많은 분들이 우리ITExamDump의Cisco 642-642자료로 시험을 패스했습니다. 이미 패스한 분들의 리뷰로 우리ITExamDump의 제품의 중요함과 정확함을 증명하였습니다.
Cisco 642-642인증시험에 응시하고 싶으시다면 좋은 학습자료와 학습 가이드가 필요합니다.Cisco 642-642시험은 it업계에서도 아주 중요한 인증입니다. 시험패스를 원하신다면 충분한 시험준비는 필수입니다.
642-642 덤프무료샘플다운로드하기: http://www.itexamdump.com/642-642.html
NO.1 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
Cisco dump 642-642 642-642 642-642 dumps 642-642덤프
NO.2 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
Cisco자격증 642-642 642-642 642-642인증
NO.3 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.4 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 dumps 642-642시험문제 642-642 pdf 642-642자료
NO.5 Answer:
NO.6 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 642-642 642-642덤프 642-642
NO.7 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 642-642 642-642 642-642자격증 642-642기출문제 642-642덤프
NO.8 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
Cisco 642-642 642-642최신덤프
NO.9 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
Cisco덤프 642-642덤프 642-642 642-642기출문제 642-642
NO.10 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
Cisco 642-642기출문제 642-642 642-642최신덤프
NO.11 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 642-642 642-642 642-642덤프 642-642 pdf
NO.12 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
Cisco최신덤프 642-642 642-642자격증 642-642 642-642
NO.13 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
Cisco pdf 642-642시험문제 642-642최신덤프
NO.14 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
Cisco시험문제 642-642 642-642자료 642-642 642-642 pdf
NO.15 Answer:
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