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 treeB、VLAN taggingC、802.1xD、Port mirroring
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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