642-642 Exam
Quality of Service (QoS)
Exam Number/Code : 642-642
Exam Name : Quality of Service (QoS)
Questions and Answers : 180 Q&As
Update Time: 2010-07-30
642-642 Price: $ 60.00

642-642 Exam Topics
The QOS 642-642 exam will test materials covered under the Implementing Cisco Quality of Service QOS v2.1 course. The exam will certify that the successful candidate has knowledge and skills necessary to configure and troubleshoot Cisco IOS routers running Quality of Service protocols in Service Provider and Enterprise environments. The exam covers topics on IP QOS, classification and marking Mechanisms, queuing mechanisms, traffic shaping and policing mechanisms, congestion avoidance mechanisms, link efficiency mechanisms, modular QOS command line interface, and QOS Best Practices.

642-642 Exam Demo
6. After learning QoS, for the following options, Which of the following characterize problems that could occur with
voice traffic when QoS is not applied in a network?(choose two)
A. Voice sounds choppy.
B. Calls are disconnected.
C. VoIP broadcasts increase as Queuing delay increases, causing delay and caller interaction problems.
D. Voice call requires more bandwidth as lost packets are retransmitted.
Answer: AB

7. What traffic type will be policed to 5-Mbps ingress to the SF router fa0/0 interface?
A. All traffic not matched by the bulk, cs6, p2p, or interactive class-maps.
B. All traffic not matched by the ospf, bulk, cs6, p2p, or interactive class-maps.
C. All traffic matched by the bulk, cs6, or interactive class-maps.
D. All traffic matched by the ospf, bulk, cs6, p2p, or interactive class-maps.
E. All traffic.
Answer: E

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