单项选择题

Which of the following "no options" controls the maximum value of mbufs？（）

A.mtu
B.sb_max
C.thewall
D.tcp_sendspace

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单项选择题Whichofthefollowingcommandsidentifiesallnetworkadaptertypesthatareinstalledinamachine？（）

A.lsdev
B.lsattr
C.ifconfig
D.netstat

单项选择题WhichofthefollowingcommandsshouldbeusedtoaltertheroutingtableonarunningsystemwithoutaffectingtheODMsettings？（）

A.inetd
B.route
C.cfgmgr
D.chdev