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当端口配置了spanning tree portfast后，从阻断状态到转发状态需要多长的时间？（）。
- A、0秒
- B、10秒
- C、15秒
- D、30秒
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更多 “当端口配置了spanning tree portfast后，从阻断状态到转发状态需要多长的时间？（）。A、0秒B、10秒C、15秒D、30秒” 相关考题
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加快Catalyst 3548发生直接链路失效时的收敛速度，正确配置生成树可选功能的命令是( )。A) spanning-tree backbonefastB) spanning-tree porfast defaultC) spanning-tree uplinkfast max-update-rate 32000D) set span tree uplindfast enable rate 40
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要将交换机100M端口的路径成本设置为25,以下哪个命令是正确的?()
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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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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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要在连接到服务器的端口上禁用STP,可使用下面哪个命令?()
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Which command enhances the 802.1D convergence time on ports that are connected to hosts?()
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Which command enables RSTP on a switch?()
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Which command enables RSTP on aswitch?()
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图5-5是在某交换机配置过程中，在配置模式下执行(30)命令的系统输出信息。A．show spanning-treeB．show spanning-tree vlan 1C．show spanning-tree detailD．show spanning-tree summary
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能够将分布交换机配置为生成树的主根交换机的命令是（）。A、spanning-tree vlan vlan-id primaryB、spanning-tree vlan vlan-id root primaryC、spanning-tree root primaryD、spanning-tree bridge root
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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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Which of the following conditions guarantees that a broadcast storm cannot occur？（）A、a native VLAN mismatch on either side of an 802.1Q linkB、BPDU filter configured on a link to another switchC、Spanning Tree Protocol enabled on both Layer 2 and multilayer switchesD、PortFast enabled on all access and trunk ports
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The following was configured on a switch： Switch（config） # spanning-tree portfast bpdufilter default What is the effect of this configuration command？（）A、If BPDUs are received by a port configured for PortFast， they are ignored and none are sent.B、The command will enable BPDU filtering on all ports regardless of whether they are configured for BPDU filtering at the interface level.C、If BPDUs are received by a port configured for Portfast， the port will transition to forwarding state.D、If BPDUs are received by a port configured for PortFast， then PortFast is disabled and the BPDUs are processed normally.E、None of the other alternatives apply.
考题
Which command enables RSTP on a switch?（）A、spanning-tree mode rapid-pvstB、spanning-tree uplinkfastC、spanning-tree backbonefastD、spanning-tree mode mst
考题
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
考题
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
考题
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
考题
单选题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
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
单选题当端口配置了spanning tree portfast后，从阻断状态到转发状态需要多长的时间？（）。A
0秒B
10秒C
15秒D
30秒
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