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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在高性能路由器上设计与实现ARP协议时存在三个关键问题：ARP表的一致性、ARP表访问失效和ARP协议的安全。

When designing and implementing the ARP protocol in high-end routers, we must deal with three key issues: consistency of the ARP table, ARP access failure and ARP security.

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第二，对无线传感器网络现有的路由协议与介质访问控制(MAC)协议进行研究。

Secondly, study the exiting routing and MAC protocols for wireless sensor network.

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