单项选择题
A.All hosts can communicate.
B.No hosts can communicate.
C.Half of the hosts will lose communication.
D.Only the two hosts between the failed connection will lose communication.
单项选择题 AuserconnectstothecompanysintranetserverviaaVPNconnectionfromasmalloffice/homeoffice（SOHO）usingthebroadbandservice.Oneday，theusercannotsuccessfullyconnecttotheVPNandreceivesanerrormessagethatstates"Usernameandpasswordareinvalidonthedomain."Whichofthefollowingshouldbedonetocorrectthisproblem？（）
单项选择题 WhichofthefollowingistrueregardingNetWareDirectoryServices（NDS）configuration？（）
单项选择题 Whichofthefollowingisaself-assignedaddressbasedonAPIPA？（）