All of the following commands could be used to verify availability of tty devices on the system EXCEPT：（）。

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

单项选择题Whichofthefollowingfunctionsdoesthe ifconfigen0 perform？（）

A.Shuts down en0
B.Displays en0 settings
C.Reconfigures en0 using the ODM
D.Sends an SNMP alert to the network administrator