YournetworkcontainsasingleActiveDirectorydomainnamedcontoso.com.ThefunctionallevelofthedomainisWindows2000mixed.YouhaveadomaincontrollernamedDC1thatrunsWindowsServer2003ServicePack2(SP2).DC1hostsastandardprimaryzoneforcontoso.com.Youneedtoensurethatonlycomputersinthecontoso.comdomaincanregisterhostrecordsinthe contoso.comzone.Whatshouldyoudo?（）
A.Convertcontoso.comtoasecondaryzone.
B.Convertcontoso.comtoanActiveDirectory-integratedzone.SetdynamicupdatesforthezonetoSecureonly.
C.Convertcontoso.comtoanActiveDirectory-integratedzone.SetdynamicupdatesforthezonetoNonsecureandsecure.
D.ChangethedomainfunctionalleveltoWindowsServer2003.SetdynamicupdatesforthezonetoNonsecureandsecure.
参考答案：B
