A.systemrestartfirewalld B.servicenetworkrestart C.init6 D.stop
A.etc/ifconfig/sysconfig B.etc/sysconfig/network-scripts C.vim/etc/sysconfig/network-scripts D.etc/zabbix-server.conf
A.CentOS7 B.CentOS6 C.CentOS6.5 D.CentOS6.8