YournetworkcontainstwoActiveDirectorysites.ThesitesconnecttoeachotherbyusingaWANlink.
YouplantodeploytwoExchangeServer2010MailboxserversandtwoClientAccessserversineachsite.
EachsitewillcontainaClientAccessarray.
YouneedtorecommendasolutiontodeployHubTransportservers.Thesolutionmustmeetthefollowingrequirements.Continuetodelivere-mailmessagestousersinothersitesifasingleHubTransportserverfails.SupporttheplannedClientAccessarraydeployment.MinimizethenumberofExchangeservers
Whataretwopossiblewaystoachievethisgoal？（）
参考答案：AB
