该协议采用UDP方式接入服务器，图中req表示请求数据包，res表示应答数据包。当设备上线时发送hello数据包给服务器，服务器检查数据的合法性，如果是非法请求，服务器将不作响应。设备收到应答数据后将发出refresh更新数据包，服务器同样先检查数据-The agreement means the use of UDP access server, the figure said req request packet, res that the response packet. When the

TCP 客户端和服务器端，非常的简单，适合初学者搞清楚TCP的原理-TCP client and server-side, very easy for beginners to figure out the principles of TCP

Distance Vector protocol for network with 30 routers and table updating with a Probability of P convergence figure

Distance Vector protocol for network with 30 routers and table updating with random link failure convergence figure-Distance Vector protocol for network with 30 routers and table updating with random link failure convergence figure

udp虽然可靠性不及，但传输效率较高。所以在网络上仍有很大的用途。这几日需要了解下udp通讯的过程，上网发现这方面的资料还挺少。于是仔细的翻找了下msdn,基本上搞清楚了udp通讯的过程。做了一个测试的例子。希望对大家有帮助。 -udp, although the reliability is less than, but the transmission efficiency is high. So there are still a lot of uses on the network. U