YouarethesystemsengineerforContoso，Ltd.TheinternalnetworkconsistsofaWindowsNT4.0domain.ThecompanymaintainsaseparatenetworkthatcontainspubliclyaccessibleWebandmailservers.TheseWebandmailserversaremembersofaDNSdomainnamedcontoso.com.Thecontoso.comzoneishostedbyaUNIX-basedDNSserverrunningBIND4.8.
Contoso，Ltd.，isplanningtomigratetoaWindowsServer2003ActiveDirectorydomain-basednetwork.ThemigrationplanstatesthatallclientcomputerswillbeupgradedtoWindowsXPProfessionalandthatallserverswillbereplacedwithnewcomputersrunningWindowsServer2003.
ThemigrationplanspecifiesthefollowingrequirementsforDNSinthenewenvironment
? ActiveDirectorydatamustnotbeaccessiblefromtheInternet.
?TheDNSnamespacemustbecontiguoustominimizeconfusionforusersandadministrators.
?Usersmustbeabletoconnecttoresourcesinthecontoso.comdomain.
?UsersmustbeabletoconnecttoresourceslocatedontheInternet.
?TheexistingUNIX-basedDNSserverwillcontinuetohostthecontoso.comdomain.
?TheexistingUNIX-basedDNSservercannotbeupgradedorreplaced.
YouplantoinstallaWindowsServer2003DNSserverontheinternalnetwork.
YouneedtoconfigurethisWindows-basedDNSservertomeettherequirementsspecifiedinthemigrationplan.
Whatshouldyoudo？（）
参考答案：A
