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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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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 treeB
VLAN taggingC
802.1xD
Port mirroring
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单选题Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?（）A
Rollover cableB
Console cab leC
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Serial cable
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单选题What kind of cable should be used to establish a trunked line between two Catalyst 2950 switches?（）A
a straight-through cableB
an EIA/TIA-232 serial cableC
an auxiliary cableD
a modem cableE
a cross-over cable
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