A.ifconfigeth1 B.ifupeth1 C.ifdowneth1 D.ifconfigeth0up
A./etc/sysconfig/network/ifcfg-eth0 B.etc/sysconfig/network/ifcfg-eth2 C./etc/sysconfig/network-scripts/ifcfg-eth0 D./etc/sysconfig/network-scripts/ifcfg-eth1
A.ifconfigeth1172.16.8.8netmask255.255.255.0 B.ifconfigeth1172.16.8.8 C.ipconfigeth1172.16.8.8netmask255.255.255.128 D.ifconfigup172.18.48.65netmask255.255.255.128