单项选择题 The order of name resolution can be controlled. The default is：   1.BIND   2.NIS   3./etc/hosts   To change the order of the above name resolutions， which of the following should be used？（）

单项选择题 WhichofthefollowingNISdaemonsmustrunonanAIXmachineconfiguredasanNISmaster？（）

单项选择题 Asystemadministratorhasaddedanewportentryin/etc/servicesforanewapplicationtobetested.Whichofthefollowingcommandsshouldbeusedtoactivatethisport？（）