A system administrator has created tty2 on a serial por……

单项选择题WhichofthefollowingisTRUEabouttheateprogram？（）

A.When running ate for the first time it will prompt for all the required information and configure all the required devices
B.The program is used by cu to communicate to a remote system
C.The program is used for remote communications between the host and a remote system using a modem or null modem via a tty port
D.The program ate calls cu to communicate with the remote system

单项选择题Whichofthefollowinglineswillbeaddedtothefile usr lib uucp DevicesontheSLIPclientmachineforaSLIPconnectionontty1？（）

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？（）

A.update /etc/rc.nfs
B.issue the chnfs command
C.recycle nfsd
D.unmount and remount the file systems

单项选择题Whichcommandcanbeusedtoverifythatfilesystemsarebeingexportedbyaserver？（）

A.showmount -e ServerName
B.vi /etc/exports
C.startsrc -g nfs
D.exportfs -i FileSystemName

单项选择题AgatewaymachinehasaccesstotheInternetandistryingtoreachamachineontheInternetcalledcactus.org.Althoughthegatewaymachinecannotreachcactus.org，anothernetworkacrosstownisabletoreachcactus.org.Furthermore，thegatewaymachinecanreachthenetworkacrosstown，butcannotpingthecactus.org.Whichofthefollowingtoolswillbesthelpdiagnosethelocationoftheproblem？（）

A.iptrace
B.netstat
C.tcpdump
D.traceroute