单项选择题
A.ftpd
B.imapd
C.pop3d
D.sendmail
单项选择题 Amachine’sONLYexternalinterfaceisconfiguredwithanaddressof192.168.5.1andanetmaskof255.255.255.0.Noslotsareavailableforexpansion.Whichofthefollowingproceduresshouldbeperformedtomakeitfunctionasagateway？（）
单项选择题 Allofthefollowingcommandscanbeusedtoplaceaninterfaceintothe"down"stateEXCEPT：（）。
单项选择题 Whichcommandwillchangethequantityofbioddaemonsimmediatelyandforeachsubsequentreboot？（）