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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
参考答案
更多 “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” 相关考题
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Which two of the following values does STP take into consideration when it elects the root bridge? (Select two answer choices)A. The BPDU version numberB. The access layer bridge settingC. The Bridge IDD. The spanning-tree update numberE. The bridge priorityF. The VLAN number
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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
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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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当你想关闭一台直接连在服务器上的交换机上的STP功能时，你不会使用下面哪些命令（）A、Disablespanning-treeB、spanning-tree offC、spanning-tree securityD、spanning-tree portfastE、spanning-tree down
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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 two statements about spanning tree path cost are true？（）A、The path cost can be changed for an interface using the spanning-tree cost commandB、The path cost can be changed for an interface using the stp path-cost commandC、The SPT default path cost depends on the interface speedD、The STP default path cost is similar for all interface
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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
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Which spanning Tree Protocol has been implemented on switch 2？ （）A、STP/IEEE 802.1DB、MSTP/IEEE 802.1sC、PVST+D、PVRSTE、None of the other alternatives apply
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Which two of the following values does STP take into consideration when it elects the root bridge?（）A、The BPDU version numberB、The access layer bridge settingC、The Bridge IDD、The spanning-tree update numberE、The bridge priorityF、The VLAN number
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The Company network utilizes the Multiple-instance Spanning Tree protocol in its switched LAN. Which three statements about the MST protocol （IEEE 802.1S） are true？ （）A、 To verify the MST configuration， the show pending command can be used in MST configuration mode.B、 When RSTP and MSTP are configured； UplinkFast and BackboneFast must also be enabled.C、 All switches in the same MST region must have the same VLAN-to-instance mapping， but different configuration revision numbers.D、 All switches in an MST region， except distribution layer switches， should have their priority lowered from the default value 32768.E、 An MST region is a group of MST switches that appear as a single virtual bridge to adjacent CST and MST regions.F、 Enabling MST with the "spanning-tree modemst" global configuration command also enables RSTP.
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You have a trunk link operating between two switches and you’re experiencing problems withframes leaking between the two VLANs. Each switch has identical modules， software revisionsand VLAN configuration information. Spanning tree protocol is disabled on all VLANs. What isprobably causing this problem？（）A、The link is using IEEE 802.1Q protocolB、The link is using IEEE 802.1E protocolC、Spanning tree is disabledD、Not enough information to determineE、The native VLAN information is identical at each end of the linkF、The native VLAN information is different at each end of the link
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Spanning Tree Protocol IEEE 802.1 s defines the ability to deploy which of these？（）A、one global STP instance for all VLANsB、one STP instance for each VLANC、one STP instance per set of VLANsD、one STP instance per set of bridges
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pany uses MSTP within their switched LAN. What is the main purpose of Multiple Instance Spanning Tree Protocol （MSTP）？（）A、 To enhance Spanning Tree troubleshooting on multilayer switchesB、 To reduce the total number of spanning tree instances necessary for a particular topology C、 To provide faster convergence when topology changes occur in a switched networkD、 To provide protection for STP when a link is unidirectional and BPDUs are being sent but not receivedE、 None of the other alternatives apply
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Spanning Tree Protocol IEEE 802.1s defines the ability to deploy which of these？ （）A、one global STP instance for all VLANsB、one STP instance for each VLANC、one STP instance per set of VLANsD、one STP instance per set of bridges
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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 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 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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多选题Which two statements about spanning tree path cost are true？（）AThe path cost can be changed for an interface using the spanning-tree cost commandBThe path cost can be changed for an interface using the stp path-cost commandCThe SPT default path cost depends on the interface speedDThe STP default path cost is similar for all interface
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单选题Spanning Tree Protocol IEEE 802.1s defines the ability to deploy which of these？（）A
one global STP instance for all VLANsB
one STP instance for each VLANC
one STP instance per set of VLANsD
one STP instance per set of bridges
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
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多选题Which two statements about the various implementations of STP are true？（）Amon Spanning Tree maintains a separate spanning-tree instance for each VLAN configured in the network.BThe Spanning Tree Protocol （STP） is an evolution of the IEEE 802.1w standard.CPer-VLAN Spanning Tree （PVST） supports 802.1Q trunking.DPer-VLAN Spanning Tree Plus（PVST+） is an enhancement to 802.1Q specification and is supported only on Cisco devices.ERapid Spanning Tree Protocol （RSTP） includes features equivalent to Cisco PortFast， UplinkFast， and BackboneFast for faster network reconvergence.FMultiple 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 two of the following values does STP take into consideration when it elects the root bridge?（）AThe BPDU version numberBThe access layer bridge settingCThe Bridge IDDThe spanning-tree update numberEThe bridge priorityFThe VLAN number
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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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