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NAT穿越模块的设计与实现，NAT实现了公网地址和内网地址之间的映射，可从两个方面来概括：(1) 当内网内的IP包经过NAT需要流入公网时，NAT将此IP 包的源IP地址和端口改为NAT接口上的一个公网地址和端口；(2)当公网中的IP包经过NAT 需要访问内网资源时，NAT将此IP 包的目的地址和端口改为内网IP 地址和端口-NAT through the Design and Implementation of Module, NAT a public network address and

socket网络套接字编程，udp包过滤源代码，实现服务器客户端包过滤过程-Socket network socket programming, udp packet filter source code, to achieve the server client packet filtering process

Since RREQ packets are flooded throughout the network, this algorithm does not scale well to large networks. If the destination node is located relatively near the source, issuing a RREQ packet that potentially pass through every node in the network