单项选择题 Asystemsadministratorhasahighperformanceserverwithafilesharefullofdatathathasnot beenusedinalongtime，butisstillimportantandmightbeusedinthefuture.Whichofthe followingshouldtheydotoreclaimthespaceoffthehighperformanceserver？（）

单项选择题 Whichofthefollowingconceptsisdescribedasmultiple（多重）logical（逻辑）subnets（子网）traversingthesamephysicalnetwork（物理网络）？（）

单项选择题 AcompanyutilizestheGFSbackupstandard.Whichofthefollowingdescribes（解释，翻译，描述）thisbackupmethod（方法，方式）？（）