YouareasystemsadministratorresponsibleforconfiguringaWindowsServer2008SMTPserver.YourorganizationiscurrentlyusingthedefaultSMTPvirtualserverforsendingordernotifications fromasingleWebapplicationcalledContosoOrderManagement.Recently，youhavenoticedthatalargenumberofmessageshavebeensenttotheSMTPvirtualserverfromothercomputersandusers.Which twomethodscanyouusetopreventunauthorizedaccesstotheSMTPserver？（）
A.EnableBasicAuthentication.
B.ConfigureasmarthostforusebytheSMTPvirtualserver.
C.AddConnectionControlentriestolimitwhichIPaddressescanusetheSMTPserver.
D.ModifysettingsontheSecuritytabofthepropertiesoftheSMTPvirtualserver.
参考答案：AC
