In Huawei Fusion Computer, which of the following descriptions about security group rules is incorrect ()

A、Whenavirtualmachinehasmultiplenetworkcards,youcanconfigureasecuritygroupforeachnetworkcard
B、Aftercreatingasecuritygroupandaddingrules,thevirtualmachinecancommunicatewiththeoutsideworld
C、AllvirtualmachineNICsinthesamesecuritygroupwillusethesecuritygrouprulesforaccesscontrol
D、Theessenceofasecuritygroupisacollectionofrules