单项选择题
AuserconnectstothecompanysintranetserverviaaVPNconnectionfromasmalloffice/homeoffice（SOHO）usingthebroadbandservice.Oneday，theusercannotsuccessfullyconnecttotheVPNandreceivesanerrormessagethatstates'Usernameandpasswordareinvalidonthedomain.'Whichofthefollowingshouldbedonetocorrectthisproblem？（）
A.CallthecorporatehelpdesktohavetheVPNserverrebooted
B.Re-entertheusernameandpasswordintheVPNconnectionandreconnect
C.CallthebroadbandInternetprovidertoreplacetheSOHOrouterwithanewermodel
D.PingthecorporateVPNservertoensureitisonline
A.Oneday，theusercannotsuccessfullyconnecttotheVPNandreceivesanerrormessagethatstates'Usernameandpasswordareinvalidonthedomain.'Whichofthefollowingshouldbedonetocorrectthisproblem？（）
A.CallthecorporatehelpdesktohavetheVPNserverrebooted
B.Re-entertheusernameandpasswordintheVPNconnectionandreconnect
C.CallthebroadbandInternetprovidertoreplacetheSOHOrouterwithanewermodel
D.PingthecorporateVPNservertoensureitisonline
