Which of the following local files is used to run the date command on the remote machine "Earth" using the following rexec command without request for a password？ rexec Earth date（）。

单项选择题AllofthefollowingcommandscouldbeusedtoverifyavailabilityofttydevicesonthesystemEXCEPT：（）。

A.lstty
B.lscons
C.lsdev
D.lscfg

单项选择题Whatisthepurposeof etc uucp Devices？（）

A.Defines permissions for remote machines contacting the local machine through BNU
B.Specifies dialer and modem types for uucp connections
C.Defines basic communication parameters
D.Assigns alternate or additional Systems， Devices and Dialers files

单项选择题Whichofthefollowingcommandsgathersnetworkpacketstatistics？（）

A.netstat -i
B.ifconfig -a
C.errpt -a
D.iptrace -i

单项选择题Whichofthefollowingflowcontrolsettingsallowsresumptionofsuspendedoutputbyhittingthe R key？（）

A.XON/XOFF
B.NONE
C.RTS/CTS
D.XON/IXANY

单项选择题AnAIXserverhas2networkinterfacesandthesystemadministratorwantstoenabletheusersonthelocallyconfigurednetworkinterfacetobeabletoconnecttosystemsconfiguredontheglobalnetworkinterface.Howisitaccomplished？（）

A.Enable routed on the server
B.Enable gated on the server
C.Enable ipforwarding on the server
D.Set network options back to default