Atwo-nodeclusterisattachedviaSANtoshareddisk.Thecustomerhasrequestedthatoneofthenodesbemovedtoanotherroom300feetaway.However，thisdistanceexceedsthelengthspecifiedbytheRS232specifications.WhatsolutionwouldresolvetheRS232specificationissuewiththefewestadditionalcomponents？（）
A.TargetmodefiberchannelcanbeusedwithaSANsolution.
B.Theheartbeatcouldbeestablishedbyusingadiskheartbeat.
C.AnRS232linedrivercanbeusedtoextendtheexistingserialconnection.
D.TheNIMfortheserialconnectioncanbealteredtocompensatefortheadditionaldelay causedbytheincreaseddistance.
参考答案：B
