单项选择题

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

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

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单项选择题

What is the purpose of /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

Which of the following commands gathers network packet statistics？（）

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

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Which of the following flow control settings allows resumption of suspended output by hitting the "R" key？（）

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