单项选择题
A.高易用性B.可靠性C.安全性D.兼容性不佳
A.firewall-configB.systemctl enable firewalldC.firewall-cmd --reloadD.firewall-cmd --list-all
A.firewall-cmd –get-default-zoneB.firewall-cmd –get-active-zonesC.firewall-cmd –get-zonesD.firewall-cmd –zone=public –list-all