单项选择题

Linux创建目录使用哪条命令()

A.mkdir
B.mkfile
C.mv
D.cp

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单项选择题

WhichstatementistrueaboutKompella－basedandMartina－basedVPNs？（）

A.BothuseLDP
B.BothuseBGP
C.Bothrequireadditionalhardware.
D.Bothuseatwo-labelstackforforwarding.

单项选择题

ForIKEphase1negotiations，whenisaggressivemodetypicallyused？（）

A.whenoneofthetunnelpeershasadynamicIPaddress
B.whenoneofthetunnelpeerswantstoforcemainmodetobeused
C.whenfragmentationoftheIKEpacketisrequiredbetweenthetwopeers
D.whenoneofthetunnelpeerswantstospecifyadifferentphase1proposal