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单选题
Which Packet Flow Acceleration feature is most effective for short-lived TCP sessions?（）
A
Active Flow Pipelining
B
Fast Connection Setup
C
TCP Acceleration (AFP)
D
Forward Error Correction
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Which Packet Flow Acceleration feature is most effective for short－lived TCP sessions?()
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What are three problems with the tail drop mechanism of managing interface congestion？（）A、Queuing introduces equal delays for packets of the same flow， resulting in jitter.B、When congestion occurs， dropping affects most of the TCP sessions， which simultaneously back off and then restart again.C、All buffers can temporarily be seized by aggressive flows， and normal TCP flows experience buffer starvation.D、There is no differentiated drop mechanism. Higher priority traffic is dropped in the same way as best-effort traffic.E、In TCP starvation， traffic exceeds the queue limit because of the bursty nature of packet networks. A router cannot handle multiple concurrent TCP sessions.F、Global synchronization occurs because multiple TCP hosts reduce their transmission rates at random intervals in response to packet dropping
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Which of the following is not a characteristic of fast switching？（）A、Fast switching reducesa routers CPU utilization， compared to process switchingB、All packets of a flow， except for the first packet， use the information in the fast cacheC、It can be enabled with the interface command ip route-cacheD、Fast switching uses a fast cache maintained in a router’s control planeE、The fast cache contains information about how traffic from different data flows should beforwardedF、Even though the fast switching is enabled， the first packet of a flow is still process switched
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Which feature is a potential security weakness of a traditional stateful firewall？（）A、It cannot support UDP flows.B、It cannot ensure each TCP connection follows a legitimate TCP three-way handshake.C、It cannot detect application-layer attacks.D、The status of TCP sessions is retained in the state table after the sessions terminate.
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Exchange acceleration is not working. Which three steps should you use to troubleshoot the problem? （）(Choose three.)A、Determine if CIFS acceleration is enabled.B、Determine if TCP Acceleration (AFP) is enabled.C、Determine if Forward Error Correction is enabled.D、Determine if any tunnel bounces occurred recently.E、Determine whether both Exchange server and clients are running version 2003.
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Which two environments would take advantage of TCP Acceleration (AFP)? （）(Choose two.)A、satellite networksB、low-latency networksC、long-haul link with 95% compressibility.D、long-haul link with 10% compressibility.
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Which three types of optimization does the WX 60 device perform when Exchange 2000 and Outlook 2000 are used in the network? （）(Choose three.)A、Fast Connection SetupB、TCP Acceleration (AFP)C、Network Sequence CachingD、AppFlow's MAPI accelerationE、Molecular Sequence Reduction
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What are two features of Packet Flow Acceleration?（） (Choose two.)A、Policy-Based MultipathB、TCP Acceleration (AFP)C、Forward Error CorrectionD、Molecular Sequence Reduction
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多选题Which two environments would take advantage of TCP Acceleration (AFP)? （）(Choose two.)Asatellite networksBlow-latency networksClong-haul link with 95% compressibility.Dlong-haul link with 10% compressibility.
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多选题Which two statements about Junos software packet handling are correct?（）(Choose two.)AThe Junos OS applies service ALGs only for the first packet of a flow.BThe Junos OS uses fast-path processing only for the first packet of a flow.CThe Junos OS performs policy lookup only for the first packet of a flow.DThe Junos OS applies SCREEN options for both first and consecutive packets of a flow.
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单选题Which of the following is not a characteristic of fast switching？（）A
Fast switching reducesa routers CPU utilization， compared to process switchingB
All packets of a flow， except for the first packet， use the information in the fast cacheC
It can be enabled with the interface command ip route-cacheD
Fast switching uses a fast cache maintained in a router’s control planeE
The fast cache contains information about how traffic from different data flows should beforwardedF
Even though the fast switching is enabled， the first packet of a flow is still process switched
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单选题Which feature is a potential security weakness of a traditional stateful firewall？（）A
It cannot support UDP flows.B
It cannot ensure each TCP connection follows a legitimate TCP three-way handshake.C
It cannot detect application-layer attacks.D
The status of TCP sessions is retained in the state table after the sessions terminate.
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多选题What are three problems with the tail drop mechanism of managing interface congestion？（）AQueuing introduces equal delays for packets of the same flow， resulting in jitter.BWhen congestion occurs， dropping affects most of the TCP sessions， which simultaneously back off and then restart again.CAll buffers can temporarily be seized by aggressive flows， and normal TCP flows experience buffer starvation.DThere is no differentiated drop mechanism. Higher priority traffic is dropped in the same way as best-effort traffic.EIn TCP starvation， traffic exceeds the queue limit because of the bursty nature of packet networks. A router cannot handle multiple concurrent TCP sessions.FGlobal synchronization occurs because multiple TCP hosts reduce their transmission rates at random intervals in response to packet dropping
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多选题What are two features of Packet Flow Acceleration?（） (Choose two.)APolicy-Based MultipathBTCP Acceleration (AFP)CForward Error CorrectionDMolecular Sequence Reduction
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单选题Which statement describes the below output from an MDS switch？（） Flow ID. 44 Initiator VSAN： 200 Initiator WWN： 50：06：04：8a：cc：19：12：db Target VSAN： 200 Target WWN： 50：06：04：8c：de：ad：be：ef T arget LUN： ALL LUNs Flow Verification Status： ------------------------- Initiator Verification Status： success Target Verification Status： WWN was not found in name server Initiator Linecard Status： success Target Linecard Status： Status not yet checked Feature Status： --------------- Write-Acceleration enabled Write-Acceleration Buffers： 1024 Configuration Status： flow verification failedA
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多选题Which two statements about JUNOS Software packet handling are correct？（）AJUNOS Software applies service ALGs only for the first packet of a flow.BJUNOS Software uses fast-path processing only for the first packet of a flow.CJUNOS Software performs route and policy lookup only for the first packet of a flow.DJUNOS Software applies SCREEN options for both first and consecutive packets of a flow.
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多选题CIFS acceleration is not working. Which three steps should you use to troubleshoot the problem? （）(Choose three.)AVerify that HTTP acceleration is enabled.BVerify that TCP Acceleration (AFP) is enabled.CVerify that the CIFS application definition is defined correctly.DVerify that SMB signing is not required on the clients and domain controllers.EVerify that CIFS acceleration is enabled on both the server and client-side WX devices.
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