单项选择题
	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:()。
单项选择题 Whichcommandwillchangethequantityofbioddaemonsimmediatelyandforeachsubsequentreboot?()
单项选择题 WhichDHCPallocationmethodallowsautomaticreuseofanaddressthatisnolongerneededbythelienttowhichitwasassigned?()