TheIPsubsystemfalloverbehaviorofatwo-nodeclusterisbeingtestinginalargeclientorganization.Oneofthetestsistosimulateanetwork_downeventandverifythatHACMPmovesthesingleresourcegrouptothestandbynode.Whatisthebestwaytosimulateanetworkdowncondition？（）
A.TurnofftheIPcoreswitchconnectingthetwonodes.
B.Issuethecommandstopsrc-ginetdonthenodethathastheresourcegroup.
C.Issuethecommandsh\/etc\/rc.tcpcleanonthenodethathastheresourcegroup.
D.Simultaneouslyunplugallnetworkcablesfromthenodethathastheresourcegroup.
参考答案：D
