单项选择题
A host is expected to be a mail relay or receiving endpoint. Which of the following daemons should be listening for connections on port 25？（）
A.ftpd
B.imapd
C.pop3d
D.sendmail
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相关考题
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单项选择题
Amachine’sONLYexternalinterfaceisconfiguredwithanaddressof192.168.5.1andanetmaskof255.255.255.0.Noslotsareavailableforexpansion.Whichofthefollowingproceduresshouldbeperformedtomakeitfunctionasagateway？（）
A.Enable ipforwarding only
B.Configure an alias on the same interface and enable ipforwarding
C.Add a second interface into the same subnet and enable ipforwarding
D.Add a second interface into a different subnet， and enable ipforwarding -
单项选择题
Allofthefollowingcommandscanbeusedtoplaceaninterfaceintothe"down"stateEXCEPT：（）。
A.arp
B.smit
C.chdev
D.ifconfig -
单项选择题
Whichcommandwillchangethequantityofbioddaemonsimmediatelyandforeachsubsequentreboot？（）
A.chnfs -b newvalue
B.chnfs -N -b newvalue
C.chnfs -I -b newvalue
D.netstat -s newvalue
