一个利用ICMP实现PING命令的工具

derby description, good document

本人收藏的一套成熟且经典的小型邮件发送系统，适合开发OA的朋友使用。-collection of a mature and the classic small-mail delivery system suitable for the development of OA friends use.

eMule源代码解析:eMule是一个典型的MFC程序，它的图形界面等，已经和MFC紧紧融合到了一起。-eMule source code analysis: eMule is a typical MFC program, and its graphical interface and so on, and MFC has been tightly integrated together.

一个perl开发的web服务器。简单，很适合学习-Perl development of a web server. Simple and very suitable for learning

A tutorial that tries to explain how to use and program raw sockets www.koitoer.com

Windows Sockets 规范及应用-Windows Sockets specification and application

该代码实现机对机聊天，抓取对方屏幕，传送文件，可实现TCP/UDP切换-the realization of machine code for the aircraft, chatting with each other screen crawls, and transmission of documents, TCP/UDP handoff

模拟DCS数据发包数据环境，UDP，在电厂做工程时因为不能随便接触控制网络，所以写了这样一个模拟DCS向外发布数据的程序，方便在开发环境进行调试。-UDP ，imitate DCS（Distribute Control System）output data circument。

c#自动升级源码，实现软件自动升级,值得-c# automatically upgrade source code, software auto-upgrade, it is worth

DNS解析系统，通过发送DNS协议包到DNS服务器来获取DNS-DNS analysis system, the agreement by sending a DNS packet to the DNS server to obtain the DNS