一个网络扫描器的示例编码，小而精湛，值得一看-a network scanner coding examples, a small and superb eye-catcher!

telnet,实现了服务器的功能。本软件小，却简单的实现了telnet的功能。在做软件时值得一看-telnet and realized the server function. The software is small, simple to achieve a telnet function. Doing software eye-catcher