题目内容：
Aclient/serverapplicationhasbeenconfiguredtouselocalnaming.Theclientandserverrunonseparatemachines.Whentheclienttriestoconnect，itreceivesaTNSerror.Bycarefullyexaminingtheenvironment，atnsnames.oraisfoundonlyontheOracleservermachine，amongotherthings.Aftercopyingthistnsnames.oraontotheclientmachine，theclientisabletoconnecttotheserver.Whichstatementistrue？（）A.tnsnames.oramustbeontheclientmachineforlocalnaming.
B.tnsnames.oramustberemovedfromtheserverfortheconnectiontowork.
C.tnsnames.oramustbeonboththeclientandservermachinesforlocalnaming.
D.tnsnames.oraisnotrequiredforlocalnaming;theproblemwasnotfixedbycopyingthefiletotheclient.
参考答案：