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单选题
How does weighted random early detection （WRED） prevent packet loss？（）
A
increases link capacity
B
increases buffer space to accommodate bursts of traffic from delay-sensitive applications
C
provides prioritized forwarding for drop-sensitive applications
D
drop lower priority packets before congestion occurs
E
separates traffic into as many as 64 queues that can be uniquely prioritized
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多选题拥塞避免，是指通过监视网络资源（如队列或内存缓冲区）的使用情况，在拥塞有加剧的趋势时，主动丢弃报文，通过调整网络的流量来解除网络过载的一种流控机制，常见的丢弃策略有（）。A尾部丢弃（Tail-Drop）BWFQ的丢弃方式CRED（Random Early Detection）DWRED（Weighted Random Early Detection）
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单选题How does weighted random early detection （WRED） prevent packet loss？（）A
increases link capacityB
increases buffer space to accommodate bursts of traffic from delay-sensitive applicationsC
provides prioritized forwarding for drop-sensitive applicationsD
drop lower priority packets before congestion occursE
separates traffic into as many as 64 queues that can be uniquely prioritized
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多选题What are the three elements of configuring congestion management？（）Aqueue creationBdetermining packet drop thresholdsCdetermining the random early detection methodDtraffic classificationEqueue schedulingFFIFO configuration
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单选题Random early detection (RED) is associated with which class of service component?（）A
classificationB
policingC
queuingD
scheduling
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单选题你想在你的网络中实现congestion avoidance，下面哪种机制可以实现有选择的丢弃数据包？（）A
Weighted Random Early Detection （WRED）B
Low Latency Queuing （LLQ）C
Class-based Weighted Fair Queuing （CBWFQ）D
Modified Deficit Round Robin （MDRR）
考题
单选题Which of the following would allow an administrator to incorporate a new Windows service pack into an installation when the media does not include the service pack？（）A
TemplatesB
RISC
GhostD
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考题
多选题For delay sensitive traffic， what are the three best ways that are used to prevent packet loss？ （）ACompress payload.BUse header compression.CIncrease link capacity.DUse random early detection.EGuarantee bandwidth to fragile flows.FImplement network-based application recognition.
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