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Which four Cisco Spanning Tree Protocol enhancements are supported with rapid per-VLAN Spanning-Tree plus?（）
- A、PortFast
- B、UplinkFast
- C、loop guard
- D、root guard
- E、BPDU guard
- F、BackboneFast
参考答案
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Catalyst 3500(Cisco IOS系统)中配置UplinkFast生成树可选功能的命令格式是——。A．set spantree uplinkfast enablecrB．set spantree uplinkfast enable ratestation—update—ratecrC．spanning—tree vlanvlanroot primaryD．spanning—tree uplinkfastcr·
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In the following statements about graph operations，which one is NOT correct?A．Finding critical path is an operation on directed graphB．Finding critical path is an operation on undirected graphC．Spanning tree of a graph may not be uniqueD．Minimum spanning tree of a graph may not be unique
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Catalyst 3500(Cisco．[OS系统)中配置PortFast生成树可选功能的命令格式是——。A．set spanning—tree portfastmod／portenableB．set spanning-tree portfastmod／portenableC．spanning—tree portfast defaultD．set spanning—tree portfastmod／portdefault
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Which version of spanning tree is recommended for the enterprise campus?()
A.CSTB.MSTC.STPD.PVST+E.RPVST+
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Which four Cisco Spanning Tree Protocol enhancements are supported with rapid per－VLAN Spanning－Tree plus?()
A. PortFastB. UplinkFastC. loop guardD. root guardE. BPDU guardF. BackboneFast
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Which command enhances the 802.1D convergence time on ports that are connected to hosts?()
A. spanning-tree backbonefastB. spanning-tree uplinkfastC. spanning-tree portfastD. spanning-tree cost512
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Which command enables RSTP on a switch?()
A. spanning-tree mode rapid-pvstB. spanning-tree uplinkfastC. spanning-tree backbonefastD. spanning-tree mode mst
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Which command enables RSTP on aswitch?()
A.spanning-tree mode rapid-pvstB.spanning-tree uplinkfastC.spanning-tree backbonefastD.spanning-tree mode mst
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Which spanning-tree command would cause a PortFast-enabled interface to lose its PortFast-operational status and disable BPDU filtering if it receives BPDUs？（）A、spanning-tree guard rootB、spanning-tree portfast bpduguard defaultC、spanning-tree bpduguard enableD、spanning-tree bpdufilter enableE、spanning-tree portfast bpdufilter default
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哪个命令可以在交换机启用RSTP？ （）A、 spanning-tree mode rapid-pvstB、 spanning-tree uplinkfastC、 spanning-tree backbonefastD、 spanning-tree mode mst
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Which four Cisco priority Spanning Tree Protocol enhancements are supported with rapid per-VLAN Spanning Tree？ （）A、 PortFastB、 UplinkFastC、 loop guardD、 root guardE、 BPDU guardF、 BackboneFast
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What Cisco technology protects against Spanning-Tree Protocol manipulation？（）A、 Spanning tree protectB、 Root Guard and BPDU GuardC、 Unicast Reverse Path ForwardingD、 MAC spoof guardE、 Port Security
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Which command enables RSTP on a switch?（）A、spanning-tree mode rapid-pvstB、spanning-tree uplinkfastC、spanning-tree backbonefastD、spanning-tree mode mst
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Which of the following specifications is a companion to the IEEE 802.1w Rapid Spanning Tree Protocol （RSTP） algorithm， and warrants the use multiple spanning-trees？ （）A、 IEEE 802.1s （MST）B、 IEEE 802.1Q （CST）C、 Cisco PVST+D、 IEEE 802.1d （STP）E、 None of the other alternatives apply
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Which command enhances the 802.1D convergence time on ports that are connected to hosts?（）A、spanning-tree backbonefastB、spanning-tree uplinkfastC、spanning-tree portfastD、spanning-tree cost512
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Which two statements about the various implementations of STP are true？（）A、mon Spanning Tree maintains a separate spanning-tree instance for each VLAN configured in the network.B、The Spanning Tree Protocol （STP） is an evolution of the IEEE 802.1w standard.C、Per-VLAN Spanning Tree （PVST） supports 802.1Q trunking.D、Per-VLAN Spanning Tree Plus（PVST+） is an enhancement to 802.1Q specification and is supported only on Cisco devices.E、Rapid Spanning Tree Protocol （RSTP） includes features equivalent to Cisco PortFast， UplinkFast， and BackboneFast for faster network reconvergence.F、Multiple Spanning Tree （MST） assumes one spanning-tree instance for the entire Layer 2 network， regardless of the multiple number of VLANs
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多选题Which four Cisco priority Spanning Tree Protocol enhancements are supported with rapid per-VLAN Spanning Tree？ （）APortFastBUplinkFastCloop guardDroot guardEBPDU guardFBackboneFast
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单选题哪个命令可以在交换机启用RSTP？ （）A
spanning-tree mode rapid-pvstB
spanning-tree uplinkfastC
spanning-tree backbonefastD
spanning-tree mode mst
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单选题A port in a redundant topology is currently in the blocking state and is not receiving BPDUs. To ensure that this port does not erroneously transition to the forwarding state， which command should be configured to satisfy the requirement？（）A
Switch（config）#spanning-tree loopguard defaultB
Switch（config-if）#spanning-tree bdpufilterC
Switch（config）#udld aggressiveD
Switch（config-if）#spanning-tree bpduguard
考题
单选题Which configuration is used to enable root guard？（）A
interface gig3/1 spanning-tree guard rootB
interface gig3/1 spanning-tree root guardC
interface gig3/1 spanning-tree root-guardD
interface gig3/1 spanning-tree root-guard default
考题
单选题Which version of spanning tree is recommended for the enterprise campus?（）A
CSTB
MSTC
STPD
PVST+E
RPVST+
考题
多选题In which Spanning-Tree states does a switch port learn MAC addresses?（）ABlockingBListeningCForwardingDLearningERelaying
考题
单选题What Cisco technology protects against Spanning-Tree Protocol manipulation？（）A
Spanning tree protectB
Root Guard and BPDU GuardC
Unicast Reverse Path ForwardingD
MAC spoof guardE
Port Security
考题
多选题Which four Cisco Spanning Tree Protocol enhancements are supported with rapid per-VLAN Spanning-Tree plus?（）APortFastBUplinkFastCloop guardDroot guardEBPDU guardFBackboneFast
考题
多选题Which of the following are spanning tree port states?（）ALearningBSpanningCListeningDForwardingEInitializingFFilteringGPermitting
考题
单选题Which of the following specifications is a companion to the IEEE 802.1w Rapid Spanning Tree Protocol （RSTP） algorithm， and warrants the use multiple spanning-trees？ （）A
IEEE 802.1s （MST）B
IEEE 802.1Q （CST）C
Cisco PVST+D
IEEE 802.1d （STP）E
None of the other alternatives apply
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