单项选择题
A.Automatic
B.Dynamic
C.Reuse
D.Manual
单项选择题 Ausercanpingeverythingonthelocalnetworkearth.netfromanAIXbox（whichislocatedonearth.net）.However，iftheusertriestopingsomethingonanothernetwork（mars.net）theusermusttypethefullyqualifiedhostname.WhatcantheuserdosothatthefullyqualifiedhostnamedoesnothavetobetypedeverytimetheuserwantstoaccessANYmachineonmars.net？（）
单项选择题 Anapplicationoruserexperiencespoorperformance，yetexaminationofthenfsstat-coutputindicatesnoorveryfewtimeoutsandretransmits.Thismeansthattheclientisreceivingresponsesfromtheserverasfastasitisaskingforthem.Whatisthefirstthingtobechecked？（）
单项选择题 ToenabletheSNMPdaemonduringsystemstartup，whichofthefollowingfilesshouldbemodified？（）