说明：  本Linux网络应用程序采用客户-服务器模型,并发型交互。在OSI参考模型的传输层,通过调用TCP套接字(Socket)的各种函数,使服务器和各个客户端之间建立快速可靠的连接，处理客户机发送的数据，实现流量检测与控制。
(The Linux web applications in client- server model, and cross-hair. OSI reference model in the transport layer, by calling the TCP socket (Socket) of a variety of functions, so that the server and the client between the fast and reliable connections to deal with the client to send data, the achievement of traffic detection and control.)