单项选择题
Which DHCP allocation method allows automatic reuse of an address that is no longer needed by the lient to which it was assigned？（）
A.Automatic B.Dynamic C.Reuse D.Manual
单项选择题 AsystemadministratorhaseditedthenecessaryfilesforsetupofanAIXsystemtoserveasabootpserver.Whichofthefollowingcommandsisrequiredtocompletetheactivation？（）
单项选择题 Whatistheproperwaytoensurethatupdatestothe/etc/aliasesfileareseenbysendmail？（）
单项选择题 Whatistheproperwaytorefreshsendmail？（）
