单项选择题
A.direct 9600 - /dev/tty1
B.Direct tty1 - 9600
C.Direct /dev/tty1 - 9600
D.direct tty1 - 9600
单项选择题 TheoptionsontheNFSserverusingthenfsocommandhavebeenadjusted.Whichofthefollowingtasksarerequiredinorderforthesechangestosurviveasystemreboot？（）
单项选择题 Whichcommandcanbeusedtoverifythatfilesystemsarebeingexportedbyaserver？（）
单项选择题 AgatewaymachinehasaccesstotheInternetandistryingtoreachamachineontheInternetcalledcactus.org.Althoughthegatewaymachinecannotreachcactus.org，anothernetworkacrosstownisabletoreachcactus.org.Furthermore，thegatewaymachinecanreachthenetworkacrosstown，butcannotpingthecactus.org.Whichofthefollowingtoolswillbesthelpdiagnosethelocationoftheproblem？（）