单项选择题

云计算的（）特点指的是随机应变的自助服务，高度的自助服务。

A.按需自助服务
B.无处不在的网络接入
C.资源池化
D.快速弹性伸缩

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单项选择题

E－BOD SDN方案可以为用户提供服务有：企业到企业、企业到云以及()

A.云云业务
B.分支业务
C.企业到互联网
D.集团业务

单项选择题

YourcompanyhasanActiveDirectorydomainthatrunsWindowsServer2008TheSalesOUcontainsanOUforComputers，anOUforGroups，andanOUforUsersYouperformnightlybackups.AnadministratordeletestheGroupsOUYouneedtorestoretheGroupsOUwithoutaffectingusersandcomputersintheSalesOUWhatshouldyoudo（）
A.PerformanauthoritativerestoreoftheSalesOU.
B.PerformanauthoritativerestoreoftheGroupsOU.
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D.Performanon-authoritativerestoreoftheSalesOU.

A.AnadministratordeletestheGroupsOUYouneedtorestoretheGroupsOUwithoutaffectingusersandcomputersintheSalesOUWhatshouldyoudo（）
A.PerformanauthoritativerestoreoftheSalesOU.
B.PerformanauthoritativerestoreoftheGroupsOU.
C.Performanon-authoritativerestoreoftheGroupsOU.
D.Performanon-authoritativerestoreoftheSalesOU.