Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?

admin2019-04-08  17

问题 Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?

选项 A、        BackboneFast
B、        UplinkFast
C、        Root Guard
D、        BPDU Guard
E、        BPDU Filter

答案D

解析 下面哪项交换机的功能能实现关闭正在接受BPDU且配置了PortFast接口?
考点分析:这道题考的是BPDU Guard这个概念。当端口接收到BPDU时,BUDU Guard会自动shut down此端口,这是BPDU Guard的作用。BPDU Guard通常结合PortFast用到接入端口上。
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