题目内容

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.
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

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