概要设计：基于TCP/IP可靠的点对点传输协议，通过网络编程实现服务器和客户端的数据传输。
详细设计：
首先建立SOCKET套接字，绑定端口号和相应的IP，客户端首先向服务器发送GET filename，服务器收到这个命令后解析filename并遍历相应的目录并与之匹配，若没有找到则打印错误信息，如果找到则把相应的文件发送给客户端。
若客户端向服务器发送LIST命令，服务器收到命令后遍历自己的目录并输出目录名发送到客户端，客户端接受到之后并打印输出到终端。
this is a demo for FTP (2016-09-18, C/C++, 8KB, 下载5次)
编程实现简单的协议分析器，实现捕获、分析数据包功能
它从局域网中抓取数据包，支持以太网MAC协议、IP 、ARP和TCP/UDP协议，并对它进行分析得到相应的头部信息，得到数据包的相应的首部信息。
Programming simple protocol analyzer to achieve capture, analyze packets function
It grab packets from the LAN to support Ethernet MAC protocol, IP, ARP, and TCP/UDP protocol, and analyze it to obtain the appropriate header information, the corresponding data packet header information. (2014-04-24, C/C++, 2316KB, 下载12次)
讲述了UDP程序的实现方法，并用C语言编程实现了一个UDP程序，该程序能实现广播功能和多播功能，能进行广播消息和多播消息的接发。通过本章的分析，想读者展示了UDP程序的实现过程，广播和多播的区别与共同点
UDP procedures described implementations, and programming using C language, a UDP program, the program can be for broadcast and multicast functions functions, can broadcast messages and send and receive multicast messages. Analysis of this chapter, to show readers the UDP program implementation process, the difference between broadcast and multicast with the common (2011-03-31, C/C++, 11KB, 下载95次)
第三卷的内容细节覆盖了当今TCP/IP编程人员和网络管理员必须熟练掌握的四个基本方面：
T/TCP (TCP事务协议),这是对TCP的扩展，使客户--服务器间的事务传输更快更有效和更可靠；
HTTP (超文本传送协议)，这是飞速扩展中的万维网的基础；
NNTP (网络新闻传送协议)，这是Usennet新闻系统的基础；
UNIX域协议，这是在UNIX实现中应用非常广泛的一套协议。
与前面两卷一样，本书有丰富的例子和实现的细节，他们都是4.4BSD-Lite中的网络代码。
Volume III covers the details of today' s TCP/IP programmers and network administrators must be skilled in four basic areas: T/TCP (TCP Services Agreement), which is the extension of TCP, customers- between the server Service transmission faster and more efficiently and more reliable HTTP (Hypertext Transfer Protocol), which was rapidly expanding the basis for the World Wide Web NNTP (Network News Transfer Protocol), which is the basis of Usennet information systems UNIX domain protocol, this is In the UNIX implementation is widely used set of protocols. Like the previous two volumes, the book is rich in examples and implementation details, they are in 4.4BSD-Lite networking code. (2010-07-17, C/C++, 8357KB, 下载2次)
此代码作为Server，使用TCP Socket编程技术，利用多线程并发，并且使用了线程池技术，修改宏定义可以实现任意路client并发连接到此服务器
This code as a Server, using TCP Socket programming using concurrent multi-threaded, and uses the thread pool technology, to amend the definition of macros can be complicated by the arbitrary way to connect to this server client (2009-07-27, C/C++, 4447KB, 下载233次)