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
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：
Catalyst 3500 (Catalyst OS (CatOS)系统）中配置UnlinkFast生成树可选功能的命令格式( )。A) spanning-tree uplinkfastcrB) set spantree uplinkfast enablecrC) spanning-tree uplinkfast max-update-rate0-32000orD) spanning-tree vlanvlanroot primary
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
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?() A.Switch(config)#spanning-tree cost 25B.Switch(config-if)#spanning-tree cost 25C.Switch(config)#spanning-tree priority 25D.Switch(config-if)#spanning-tree path-cost 25
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 portfast defaultC．spanning-tree uplinkfast max-update-rate 32000D．set spantree uplinkfast enable rate 40
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·
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
要在连接到服务器的端口上禁用STP,可使用下面哪个命令?() A.disable spanning-treeB.spanning-tree offC.spanning-tree securityD.spanning-tree portfast
要在交换机上运行802.1w,可使用哪个命令来启用该协议?() A.Switch(config)#spanning-tree mode rapid-pvstB.Switch#spanning-tree mode rapid-pvstC.Switch(config)#spanning-tree mode 802.1wD.Switch#spanning-tree mode 802.1w
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
Which command enables RSTP on a switch?() A. spanning-tree mode rapid-pvstB. spanning-tree uplinkfastC. spanning-tree backbonefastD. spanning-tree mode mst
Which command enables RSTP on aswitch?() A.spanning-tree mode rapid-pvstB.spanning-tree uplinkfastC.spanning-tree backbonefastD.spanning-tree mode mst
Catalyst 6500(Catalyst OS(CatOS)系统)中配置Uplink Fast生成树可选功能的命令格式是( )。A．set spantree uplink fast enableB．spanning-tree uplink fastC．spanning-tree vlan root primaryD．spanning-tree uplink fast max-update-rate 0-32000
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
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
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
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
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.
Which command enables RSTP on a switch?（）A、spanning-tree mode rapid-pvstB、spanning-tree uplinkfastC、spanning-tree backbonefastD、spanning-tree mode mst
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
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
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
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？（）Aspanning-tree guard rootBspanning-tree portfast bpduguard defaultCspanning-tree bpduguard enableDspanning-tree bpdufilter enableEspanning-tree portfast bpdufilter default
单选题Which configuration is used to enable root guard？（）Ainterface gig3/1 spanning-tree guard rootBinterface gig3/1 spanning-tree root guardCinterface gig3/1 spanning-tree root-guardDinterface gig3/1 spanning-tree root-guard default
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？（）。A0秒B10秒C15秒D30秒