本文件是嵌入式TCP/IP协议栈的说明文件，嵌入式TCP/IP应用开发人员可以通过阅读该文件，掌握在嵌入式TCP/IP协议栈的基础之上开发服务器/客户端应用程序，如FTP服务器，WEB服务器，串口服务器。-This document is embedded TCP/IP protocol stack documentation, embedded TCP/IP application development staff can read the document in the hands of the embedded TCP/IP protocol stack based on the development of server/client applications, such as FTP server, WEB server, serial server.