Youarethenetworkadministratorforyourcompany.AllnetworkserversrunWindowsServer2003ServicePack2(SP2).YoudeployaDNSservernamedDNS1thatrunsWindowsServer2003SP2.YouneedtoconfigureDNS1touseyourISP’sDNSserverstoresolveallInternetqueries.InternetnameresolutionshouldfailiftheISP’sDNSserversareunavailable.WhatshouldyouconfigureonDNS1server?（）
A.AddtheISP’sDNSserverstotheroothints.Deletetheotherroothints.
B.AddtheISP’sDNSserverstotheroothints.Deletethe%systemroot%\system32\dns\root.dnsfile.
C.ConfiguretheISP’sDNSserversasforwarders.DeselecttheEnablenetmaskorderingoption.
D.ConfiguretheISP’sDNSserverasaforwarder.SelecttheDonotuserecursionforthisdomainoption.
参考答案：D
