IT-Tests.com is a professional website. It can give each candidate to provide high-quality services, including pre-sales service and after-sales service. If you need IT-Tests.com's Cisco 642-642 exam training materials, you can use part of our free questions and answers as a trial to sure that it is suitable for you. So you can personally check the quality of the IT-Tests.com Cisco 642-642 exam training materials, and then decide to buy it. If you did not pass the exam unfortunately, we will refund the full cost of your purchase. Moreover, we can give you a year of free updates until you pass the exam.
IT-Tests.com is a website that can provide all information about different IT certification exam. IT-Tests.com can provide you with the best and latest exam resources. To choose IT-Tests.com you can feel at ease to prepare your Cisco 642-642 exam. Our training materials can guarantee you 100% to pass Cisco certification 642-642 exam, if not, we will give you a full refund and exam practice questions and answers will be updated quickly, but this is almost impossible to happen. IT-Tests.com can help you pass Cisco certification 642-642 exam and can also help you in the future about your work. Although there are many ways to help you achieve your purpose, selecting IT-Tests.com is your wisest choice. Having IT-Tests.com can make you spend shorter time less money and with greater confidence to pass the exam, and we also provide you with a free one-year after-sales service.
Exam Code: 642-642
Exam Name: Cisco (Quality of Service (QoS))
If you're still studying hard to pass the Cisco 642-642 exam, IT-Tests.com help you to achieve your dream. We provide you with the best Cisco 642-642 exam materials. It passed the test of practice, and with the best quality. It is better than Cisco 642-642 tutorials and any other related materials. It can help you to pass the Cisco 642-642 exam, and help you to become a strong IT expert.
Success is has method. You can be successful as long as you make the right choices. IT-Tests.com's Cisco 642-642 exam training materials are tailored specifically for IT professionals. It can help you pass the exam successfully. If you're still catching your expertise to prepare for the exam, then you chose the wrong method. This is not only time-consuming and laborious, but also is likely to fail. But the remedy is not too late, go to buy IT-Tests.com's Cisco 642-642 exam training materials quickly. With it, you will get a different life. Remember, the fate is in your own hands.
Cisco 642-642 is a certification exam to test IT expertise and skills. If you find a job in the IT industry, many human resource managers in the interview will reference what Cisco related certification you have. If you have Cisco 642-642 certification, apparently, it can improve your competitiveness.
642-642 (Quality of Service (QoS)) Free Demo Download: http://www.it-tests.com/642-642.html
NO.1 Answer:
NO.2 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 original questions 642-642 dumps 642-642
NO.3 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 642-642 642-642 practice test
NO.4 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
Cisco 642-642 dumps 642-642 642-642 original questions
NO.5 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 exam simulations 642-642 642-642
NO.6 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 exam simulations 642-642 test
NO.7 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 exam dumps 642-642 pdf
NO.8 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.9 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
Cisco demo 642-642 642-642
NO.10 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
Cisco 642-642 demo 642-642 642-642 test answers
NO.11 Answer:
NO.12 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 dumps 642-642 642-642 642-642
NO.13 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 exam simulations 642-642 demo 642-642 practice test
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
Cisco 642-642 test questions 642-642 pdf
NO.15 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 exam prep 642-642 answers real questions 642-642 pdf 642-642 642-642
IT-Tests.com is an excellent IT certification examination information website. In IT-Tests.com you can find exam tips and materials about Cisco certification 642-642 exam. You can also free download part of examination questions and answers about Cisco 642-642 in IT-Tests. IT-Tests.com will timely provide you free updates about Cisco 642-642 exam materials. Besides, the exam materials we sold are to provide the answers. Our IT experts team will continue to take advantage of professional experience to come up with accurate and detailed exam practice questions to help you pass the exam. In short, we will provide you with everything you need about Cisco certification 642-642 exam.
