题目内容

Whatistheresultofenteringthecommandspanning-treeloopguarddefault？（）

A. Thecommandenablesbothloopguardandrootguard.
B. Thecommandchangesthestatusofloopguardfromthedefaultofdisabledtoenabled.
C. Thecommandactivatesloopguardonpoint-to-multipointlinksintheswitchednetwork.
D. ThecommandwilldisableEtherChannelguard.

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