题目内容

YouarethenetworkadministratorfortheBeijingofficeofTestKing.Abranch officeislocatedinCairo.TheDNSserversinbothlocationsrunWindowsServer 2003. ThenetworkusestwoDNSnamespacesinternally.Theyarenamed publishing.testking.comandtestking.com.Thelocationsoftheprimaryname serversareshowninthefollowingtable. TheBeijingofficecontainssomeserversthatareregisteredinthetestking.comzone andotherthatareregisteredinthepublishing.testking.comzone.Allcomputersin theBeijingofficeareconfiguredtousethelocalDNSserverastheirpreferredDNS server.ThetwoofficesareconnectedonlybyusingaVPNthroughtheInternet. Variousnetworkproblemsoccasionallyresultinlossofconnectivitybetweenthe twooffices. FirewallspreventtheDNSserversinbothofficesfromreceivingqueriesfromthe Internet. YouneedtoconfiguretheDNSserverintheBeijingofficetoallowsuccessful resolutionofallqueriesfromtheBeijingofficefornamesinthe publishing.testking.comnamespace,evenwhentheVPNlinkbetweentheBeijing andCairoofficesfails. WhatshouldyouconfigureontheDNSserverintheBeijingoffice?（）

A. Inthetestking.comzone,createadelegatedsubdomainnamedpublishing.SpecifytheDNSserverintheCairoofficeasanameserver.
B. Createasecondaryzonenamepublishing.testking.com.SpecifytheDNSserverintheCairoofficeasamasterserver.
Configureconditionalforwardingforthepublishing.testking.comnamespace.SpecifytheDNSserverintheCairoofficeasatargetserver.
D. Createastubzonenamedpublishing.testking.com.SpecifytheDNSserverintheCairoofficeasamasterserver.

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