对于广域网(WAN)访问，将提供一(几)个路由器，通过进入通信系统发送工厂进、出ip和其它协议流量？

For WAN access, a router (s) will be provided to route plant incoming and outgoing IP and other protocol traffic via the incoming communications system.

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NAT对内网主机的出网数据包进行网络地址变换，内网主机可以使用保留地址上网，外网主机无法直接访问内网主机，从而实现单向通信。

NAT would do network address translation for outbound packet so that inside hosts can use reserved IP addresses and outside hosts can not visit inside ones directly to realize one-way communication.

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