单项选择题
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
A.firewall-cmd --stateB.systemctl status firewalldC.firewall-cmd --get-zonesD.firewall-cmd --check-config