题目内容:
A.TimerequiredforaVPNconnectiontooccurB.Timerequiredbyprotocolstoupdatetheirforwardingtablesafterchangeshaveoccurred
C.TimerequiredforanIDStodetectsuspicioussoftware
D.Timerequiredbyswitchportstoupdatetheirlinkstatusandtransitiontotheforwardingstate
参考答案: