physical firewall
物理防火墙
以上为机器翻译结果，长、整句建议使用 人工翻译 。
They invariably have several physical ports and are backed up by a second firewall that shares the load or comes online if the other one fails for some reason.
FORBES: Reduce Policy Complications to Enhance Security
应用推荐
模块上移
模块下移
不移动