多个TCP连接或多个应用程序进程可能需要通过同一个 TCP协议端口传输数据。为了区别不同的应用程序进程和连接，许多计算机操作系统为应用程序与TCP/IP协议交互提供了称为套接字(Socket)的接口。-Multiple TCP connections or multiple application processes may need to pass the same TCP protocol port to transfer data. In order to distinguish between application processes and connectivity, many computer operating system for the application with the TCP/IP protocol interaction provides an interface called socket (Socket).