单选题BPDU防护依赖下列哪种特性（）.AportfastBBPDU过滤CUPlinkfastD根防护
单选题
BPDU防护依赖下列哪种特性（）.
A
portfast
B
BPDU过滤
C
UPlinkfast
D
根防护
参考解析
解析：
暂无解析
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STP交换机会发送BPDU。关于BPDU的说法正确的是（）。A.BPDU是使用IEEE802.3标准的帧B.BPDU是使用EtherentII标准的帧C.BPDU帧的Control字段值为3D.BPDU帧的目的MAC地址为广播地址
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Which two statements are true about BPDU port-guard and BPDU filtering？（）A、BPDU port-guard can be enabled globally， whereas BPDU filtering must be enabled on a per-interface basis.B、When globally enabled， BPDU port-guard and BPDU filtering apply only to PortFast enabled ports.C、When globally enabled， BPDU port-guard and BPDU filtering apply only to trunking-enabled ports.D、When a BPDU is received on a BPDU port-guard enabled port， the interface goes into the err-disabled state.E、When a BPDU is received on a BPDU filtering enabled port， the interface goes into the err-disabled state.F、When a BPDU is received on a BPDU filtering enabled port， the interface goes into the STP blocking state.
多选题Which of the following characteristics describe the BPDU Guard feature？（Choose all that apply.）（）AA BPDU Guard port should only be configured on ports with PortFast enabledBBPDU Guard and PortFast should not be enabled on the same port.CBPDU Guard is used to ensure that superior BPDUs are not received on a switch portDA BPDU Guard port receiving a BPDU will go into err-disable stateEA BPDU Guard port receiving a BPDU will be disabledFBPDU Guard can be enabled on any switch port
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