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名词解释题
淤血(congestion)
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考题
You are experiencing intermittent issues relating to congestion within the Ezonexam network. What are the possible causes of congestion on this LAN? (Choose all that apply)A. A broadcast domain with too many hosts.B. Full duplex operation.C. Broadcast storms.D. Multicasting.E. Network Segmentation.F. Low bandwidth.
考题
The policy action of color is used for congestion control under which circumstance?()
A.congestion in an upstream routerB.congestion in a downstream routerC.contention for queue space on an egress interfaceD.contention for queue space on an ingress interface
考题
Which two statements are true about bandwidth guarantee？（）A、When congestion is present，the priority command doesn’t allow exceeding the allocated rateB、When congestion isn’t present，the priority command doesn’t allow exceeding the allocated rateC、When congestion is present，the priority command allows exceeding the allocated rateD、When congestion isn’t present，the priority command allows exceeding the allocated rate
考题
Which of the following are types of flow control?（）A、bufferingB、cut-throughC、windowingD、congestion avoidanceE、loadbalancing
考题
Select the three valid LMI extension.（）A、MulticastingB、Global addressingC、Forward-explicit congestion notification （FECN）D、Virtual circuit status messages.E、Backward-explicit congestion notification （BECN）
考题
Which statement is true about the components of a queuing mechanism？（）A、Each subinterface has its own hardware queue and can experience congestion just like its main interfaceB、Hardware queuing is only used if the software queues are experiencing congestion.C、Hardware queues and software queues are not used concurrently.D、The hardware queuing system always uses the FIFO queuing mechanism.
考题
What are three benefits of class of service?（）A、It can make a slow network faster.B、It can prioritize latency-sensitive traffic.C、It can eliminate congestion.D、It can control congestion.E、It can allocate bandwidth for different classes of traffic.
考题
Delay due to port congestion，pilots，tugs not available is a：（）A、Contingency；B、Emergency；C、A or B；D、D.not A nor
考题
Which of the following are types of flow control?（）A、bufferingB、cut-throughC、windowingD、congestion avoidanceE、load balancing
考题
Pick the 4 valid ATM Cell Header fields：（）A、GFC-4 bits of generic flow controlB、Forward-explicit congestion notification（FECN）C、VCI-16 bits of virtual channel identifierD、CLP-1 bit of congestion lossE、HEC-8 bit of header error controlF、ATM Discard Eligibility（DE）bit
考题
Which benefit is provided by Ethernet enhancements in the Cisco UCS?（）A、Lossless fabricB、hop-by-hop congestion managementC、non-deterministic latency for HPC clusters
考题
Which of the following are types of flow control (Choose three.)（）。A、bufferingB、cut-throughC、windowingD、congestion avoidanceE、load balancing
考题
The policy action of color is used for congestion control under which circumstance?（）A、congestion in an upstream routerB、congestion in a downstream routerC、contention for queue space on an egress interfaceD、contention for queue space on an ingress interface
考题
单选题What is the most common cause of network congestion？（）A
aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switchesB
speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environmentC
flapping Ethernet interfaces caused by misconfigured LAN interfacesD
flapping serial interfaces caused by misconfigured WAN interfacesE
speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment
考题
单选题Which statement is true about the components of a queuing mechanism？（）A
Each subinterface has its own hardware queue and can experience congestion just like its main interfaceB
Hardware queuing is only used if the software queues are experiencing congestion.C
Hardware queues and software queues are not used concurrently.D
The hardware queuing system always uses the FIFO queuing mechanism.
考题
单选题You are experiencing contention in the queue on an egress interface of the router. Which policy action should be used for congestion control?（）A
markB
colorC
filterD
discard
考题
单选题In Frame Relay， FECN messages indicating congestion are sent or received by which of following？（）A
Sent by the destinationB
Received by the senderC
Received by the destinationD
Sent by the sender
考题
多选题Select the three valid LMI extension.（）AMulticastingBGlobal addressingCForward-explicit congestion notification （FECN）DVirtual circuit status messages.EBackward-explicit congestion notification （BECN）
考题
多选题You are experiencing intermittent issues relating to congestion with your network.What are the possible causes of congestion on a LAN?（）AA broadcast domain with too many hosts.BFull duplex operation.CBroadcast storms.DMulticasting.ENetwork Segmentation.FLow bandwidth.
考题
多选题What are three benefits of class of service?（）AIt can make a slow network faster.BIt can prioritize latency-sensitive traffic.CIt can eliminate congestion.DIt can control congestion.EIt can allocate bandwidth for different classes of traffic.
考题
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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