单选题A user plugged a cable between two network jacks that attach to the same switch and caused a broadcast storm. Which of the following would have prevented the broadcast storm?（）ASpanning treeBVLAN taggingC802.1xDPort mirroring
单选题
A user plugged a cable between two network jacks that attach to the same switch and caused a broadcast storm. Which of the following would have prevented the broadcast storm?（）
A
Spanning tree
B
VLAN tagging
C
802.1x
D
Port mirroring
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