网络端口的介绍 很详细，可以看看。 也可用来查找

比较完整的FTP库，含上传、下载、删除文件功能，支持多级目录-relatively complete the FTP, including upload, download, delete the file functions for the multi-level directory

这是一个邮件收发程序,能完成邮件的收发功能-This is a mail procedures can be completed incoming and outgoing e-mail function

一个基于sip的通信源代码，很详细的文档说明，值得参考和学习-A sip of communication based on source code, the document explains in great detail, it is also useful and learning

网络通信的基本过程，采用阻塞的形式，代码简洁-The basic process of network communication using the form of blocking, code concise

实现 完成端口模型 协议为Tcp/Ip-achieve complete port model agreement for DEC/Ip

vc的简单网络编程,windows下ping程序,功能强大-vc simple network programming under windows ping procedures, powerful

非常好的Socket多线程编程例子，可用作客户端或者服务端，可以实现TCP或者UDP通信，可以同时创建n个线程-very good example of multi-threaded programming, can be used as a client or server, can achieve a TCP or UDP communications, it will also create threads n

Client程序同样分别创建一个TCP socket 和一个UDP socket，首先client使用TCP socket连接TCP Server。 连接成功后显示提示信息； 然后client端向TCP Server发送“GET UDP PORT”字符串，Server收到后向client回送自己的UDP Server 端口号（即Client端仅知道TCP Server的端口号而不知道UDP Server的端口号）； client在收到UDP Server的端口号后, 为用户显示3个选项： 1．“Get current time（TCP）”服务器时间 2．“Echo Mode（UDP）”回显6 3．“Exit the program”. -Client program also creates a TCP socket, respectively, and a UDP socket, the first client to use TCP socket connection TCP Server. After a successful connection displays a prompt message and then client-side to the TCP Server sends " GET UDP PORT" string, Server receipt back to the client to send their UDP Server port number (ie, Client-side only to know the TCP Server" s UDP port number do not know Server" s port number) client received UDP Server port number, in order to the user three options: 1. " Get current time (TCP)" server time 2. " Echo Mode (UDP)" echo 63. " Exit the program" .

简单的校验和算法，模拟通信发射和接收方间通信-A simple checksum algorithm to simulate communication between transmitting and receiving side communication

一个简单的TCP服务器端程序，帮助初学者了解网络编程的基本过程-a simple TCP server procedures to help beginners understand the basic network programming process