单项选择题 Whichofthefollowingcommandsshouldbeusedtoobtaininformationabouttheinstalledsoftware？（）

单项选择题 Abankinguserwiththeuseridof’joe’isunabletorshfromSYSTEMAtoSYSTEMBwithouthavingtoretypetheirpassword，buttheycanrshfromSYSTEMBtoSYSTEMA.Nootherusersareexperiencingthesameissue.Bothsystemshavea/home/joe/.rhostsfilethatcontaintheproperreferencestotheotherhost.The/home/joe/.rhostsfilesonbothSYSTEMAandSYSTEMBareownedbyuserid’joe’.Whichofthefollowingisthemostlikelycauseofthisproblem（）A.User’joe’isspecifiedinthe/etc/nologinonSYSTEMb.B.User’joe’isspecifiedinthe/etc/nologinonSYSTEMa.C.Thefilepermissionsonthe/home/joe/.rhostsfileonSYSTEMAareincorrect.D.Thefilepermissionsonthe/home/joe/.rhostsfileonSYSTEMBareincorrect.

单项选择题 Whichofthefollowingclassnetworkscontains65，534hosts？（）

单项选择题 软件定义存储（SDS）实质上是利用存储虚拟化软件，将物理设备中的存储（无论是基于块、文件，还是对象）抽象为（），通过虚拟化层进行存储管理。

单项选择题 Duringaplanningsession，thecustomerindicatesthattheyintendtobuildtwoindependenttwo-Nodeclusters（cluster’A’and’B’）thatwillbeprovidedsharedstorageformanIBMTotalStorageFAStT900server.Thecustomerintendstopresent2LUNstocluster’A’，and2LUNstocluster’B’.Allhostswillbedualattachedviafibre.Whatadditionalhardwareorsoftwareisnecessarytomakethisavalidconfiguration？（）A.SANswitchesB.FibrechannelHub（s）C.IBMStorageManagerAgentsD.IBMSubsystemDeviceDriver