所谓socket通常也称作"套接字"，用于描述IP地址和端口，是一个通信链的句柄。应用程序通常通过"套接字"向网络发出请求或者应答网络请求。-Socket is often referred to as the so-called " socket"　used to describe the IP address and port, is a communications chain handle. Applications are usually through the " socket"　to the network response to a request or the request of the network.