642-642 Questions and Answers
642-642 exam
Quality of Service (QoS)
Review Number / Code: 642-642
Review Name: Quality of Service (QoS)
Questions and Answers: 181 Q & As Update Time
: 2010-05-31
642-642 Price: $ 79.00
642-642
Demo Review 5 After learning QoS, for the following, which of the following characterize the problems that can occur with voice traffic when QoS is not used in a network? (Choose two) A.
voice sounds rough.
B. The calls are disconnected.
C. VoIP emissions increase as increases queuing delay, causing delays and problems with caller interaction.
D. call requires more bandwidth than the lost packets are transmitted
answer. AB
6 As a candidate for the CCVP test, can you tell me what a router based his opinion on how much bandwidth for a tool of queues on a serial port available? A.
The control bandwidth is required before a tool is not queue knows how much bandwidth is available.
automatically recognized as the physical speed of the serial interface.
C. The Clock command is required before a tool is not queue knows how much bandwidth is available.
D. By default, the T1 speed, provided that the control bandwidth was configured
answer. D
642-642 methods for congestion management
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targets classification and labeling review
Explain how link layer and network layer markings are used to define service classes and the different uses of each service Class
represent a network and a description of QoS issues commands given MQC CLI classify packets
Given a network and a description of the service quality issues, use class-based marking packets to a specific service
Describe the purpose of the pre-classification support QoS in various VPN (IPSec, GRE, L2TP) configurations Describe QoS trust boundaries
and their importance in LAN-based classification and marking />
Explain the hardware components and software queues on Cisco routers and how by tuning and congestion
Describe the benefits and drawbacks of using WFQ to implement QoS
Explain the purpose and made features of the Class -Based WFQ (CBWFQ)
Explain the purpose and features of Low Latency Queuing (LLQ)
Identify the Cisco IOS commands to configure and monitor LLQ on a Cisco router explain
Describe and queues on the various options
2950