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单选题
Which QoS requirement applies to streaming video traffic？（）
A
one-way latency of 150 ms to 200 ms
B
jitter of 30 ms or less
C
packet loss of 2 percent or less
D
150bps of overhead bandwidth
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VPN traffic needs to be classified based on the Layer2 header informationB
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VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP addressD
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考题
单选题Which statement is true about the comparison of voice traffic with video traffic？（）A
Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.B
Latency requirements are less stringent for video traffic than for voice traffic.C
Video traffic is less sensitive to dropped packets than for voice traffic.D
Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP.E
Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.F
Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP.
考题
单选题As an experienced network administrator, you are asked to troubleshoot a QoS problem. In which way might the Cisco NetFlow be helpful during the troubleshooting process?（）A
NetFlow can discover the protocols in use and automatically adjust QoS traffic classes to meet policy-map requirements.B
NetFlow records can be used to understand traffic profiles per class of service for data, voice, and video traffic.C
NetFlow can be configured to identify voice and video traffic flows and place them into a low-latency queue for expedited processing.D
NetFlow can report on the number of traffic matches for each class map in a configured QoS policy configuration.
考题
单选题Which QoS requirement applies to streaming video traffic？（）A
one-way latency of 150 ms to 200 msB
jitter of 30 ms or lessC
packet loss of 2 percent or lessD
150bps of overhead bandwidth
考题
多选题Which three characteristics of the traffic flow are taken into consideration when the QoS-for-VPNs feature （QoS pre-classify） provides packet classification and applies appropriate QoS service on tunnel interfaces？（）AIP precedence bitsBDSCP bitsCoriginal port numbersDDE bitsEsource IP addressFdestination IP address
考题
单选题What are the steps for configuring stateful NBAR for dynamic protocols？ （）A
use the command ip nbar protocol-discovery to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interfaceB
use the command match protocol rtp to allow identification of real-time audio and video traffic. Use the command ip nbar port-map to extend the NBAR functionality for well-known protocols to new port numbersC
use the command match protocol to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interfaceD
configure a traffic class. Configure a traffic policy. Attach the traffic policy to an interface. E
configure video streaming. Configure audio streaming. Attach the codec to an interface
考题
单选题Which QoS requirement applies to streaming video traffic?（）A
one-way latency of 150 ms to 200 msB
jitter of 30 ms or lessC
packet loss of 2 percent or lessD
150bps of overhead bandwidth
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