Network security includes a series network security technique that fireproofing wall is representation. Those are IP address transition technique, service deputy, dummy special network technique, system separating inner net and outer net, and so on.

• 网络安全技术包括以防火墙技术为代表的系列网络安全技术，即IP地址转换技术、服务代理技术、虚拟专用网络技术、将系统分为内网同外网等。