CMS专题
单选题Which statement correctly describes enabling BPDU guard on an access port that is also enabled for PortFast？（）A Upon startup， the port transmits 10 BPDUs. If the port receives a BPDU， PortFast and BPDU guard are disabled on that port and it assumes nor
题目
Upon startup， the port transmits 10 BPDUs. If the port receives a BPDU， PortFast and BPDU guard are disabled on that port and it assumes normal STP operation.
The access port ignores any received BPDU.
If the port receives a BPDU， it is placed into the error-disable state.
BPDU guard is only configured globally and the BPDU filter is required for port-level configuration.
参考答案和解析
相似问题和答案
第1题：
Which of the following characteristics describe the BPDU Guard feature（）
- A、ABPDU Guard port should only be configured on ports with PortFast enabled.
- B、BPDU Guard and PortFast should not be enabled on the same port.
- C、BPDU Guard is used to ensure that superior BPDUs are not received on a switch port.
- D、ABPDU Guard port receiving a BPDU will go into err-disablestate.
- E、ABPDU Guard port receiving a BPDU will be disabled.
- F、BPDU Guard can be enabled on any switch port.
正确答案:A,E
第2题：
Which two are natively included by the IEEE 802.1w standard？（）
- A、instances can control a selection of VLANs
- B、load balancing
- C、fast transition to forwarding state
- D、backbone，uplink，and portfast （or equivalent）
- E、root，loop，and BPDU guard （or equivalent）
正确答案:C,D
第3题：
B．A voiced labiodental fricative
C．A voiceless labiodental plosive
D．A voiced labiodental plosive
第4题：
Which statement correctly describes enabling BPDU guard on an access port that is also enabled for PortFast？（）
- A、Upon startup， the port transmits 10 BPDUs. If the port receives a BPDU， PortFast and BPDU guard are disabled on that port and it assumes normal STP operation.
- B、The access port ignores any received BPDU.
- C、If the port receives a BPDU， it is placed into the error-disable state.
- D、BPDU guard is only configured globally and the BPDU filter is required for port-level configuration.
正确答案:C
第5题：
Examine the following options，which Spanning Tree Protocol （STP） protection mechanism disables aswitch port if the port receives a Bridge Protocol Data Unit （BPDU）？（）
- A、Uplink Fast
- B、Port Fast
- C、BPDU Guard
- D、Root Guard
正确答案:C
第6题：
Which of the following characteristics describe the BPDU Guard feature？（Choose all that apply.）（）
- A、A BPDU Guard port should only be configured on ports with PortFast enabled
- B、BPDU Guard and PortFast should not be enabled on the same port.
- C、BPDU Guard is used to ensure that superior BPDUs are not received on a switch port
- D、A BPDU Guard port receiving a BPDU will go into err-disable state
- E、A BPDU Guard port receiving a BPDU will be disabled
- F、BPDU Guard can be enabled on any switch port
正确答案:A,E
第7题：
The network administrator has enabled BPDU guard on the LAN. Why is an effective way to prevent an unauthorized rogue switch from altering the spanning-tree topology of this network？ （）
- A、BPDU guard can be used to prevent invalid BPDUs from propagating throughout the network.
- B、BPDU guard can guarantee proper selection of the root bridge.
- C、BPDU guard can be utilized to prevent the switch from transmitteing BPDUs and incorrectly altering the root bridge election.
- D、BPDU guard can be utilized along with PortFast to shut down ports when a switch is connected to the port.
- E、None of the other alternatives apply
正确答案:D
第8题：
B.A voiceless alveolar fricative.
C.A voiceless dental plosive.
D.A voiceless alveolar plosive.
第9题：
Which two statements correctly describe characteristics of the PortFast feature？ （）
- A、STP will be disabled on the port.
- B、PortFast can also be configured on trunk ports.
- C、PortFast is required to enable port-based BPDU guard.
- D、PortFast is used for both STP and RSTP host ports.
- E、PortFast is used for STP-only host ports.
正确答案:B,D
第10题：
Which statement correctly describes the Cisco implementation of RSTP？ （）
- A、PortFast， UplinkFast， and BackboneFast specific configurations are ignored in Rapid PVST mode.
- B、RSTP is enabled globally and uses existing STP configuration.
- C、Root and alternative ports transition immediately to the forwarding state.
- D、Convergence is improved by using sub-second timers for the blocking， listening， learning， and forwarding port states.
正确答案:B