单选题What is the result of entering the command spanning-tree loopguard default？（）AThe command enables both loop guard and root guard.BThe command changes the status of loop guard from the default of disabled to enabled.CThe command activates loop guard on point-to-multipoint links in the switched network.DThe command will disable EtherChannel guard.
单选题
What is the result of entering the command spanning-tree loopguard default？（）
A
The command enables both loop guard and root guard.
B
The command changes the status of loop guard from the default of disabled to enabled.
C
The command activates loop guard on point-to-multipoint links in the switched network.
D
The command will disable EtherChannel guard.
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