单项选择题
A.Run the command ’no -d’ to set network options to default
B.Edit /etc/rc.tcpip and enable gated
C.Edit /etc/rc.tcpip and enable routed
D.Edit /etc/rc.net and enable ipforwarding
单项选择题 Whichofthefollowingcommandsshouldbeusedtomakepermanentstaticrouteentriesthatwillpersistacrossreboots？（）
单项选择题 Whichofthefollowingparameterscanpreventpacketfragmentationonrouterswhenconnectingtoremotenetworks？（）
单项选择题 InaTCP/IPnetwork，whichofthefollowingprotocolsisinvolvedwhenauserissuesapingcommand？（）