socket通信，包括SERV和CLIENT通信机制，可以用来建立基于ｓｏｃｋｅｔ通信的网络应用程序开发。

socket编程的交互式聊天系统，有客户端和服务端，比较简单的一个程序-socket programming, interactive chat system, with client and service side, a relatively simple procedure

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