单项选择题
A.DMgr B.node C.cell D.admin
A./etc/security/failedlogin B./var/adm/sulog C./var/adm/wtmp D./var/spool/cron/crontabs/root
A.DNS、NIS、/etc/hosts B.NIS、DNS、/etc/hosts C./etc/hosts、DNS、NIS D.DNS、/etc/hosts、NIS