5大IO模型之一：select模型，介绍selectio的一般流程

Socket 异步通信，用户可以用不同的方式 不必须等待一个操作结束，然后在做别的操作，可以并行操作Socket。-Socket asynchronous communication, users can use a different method does not have to wait until the end of an operation, and then doing other operations, operating in parallel socket.

1. 目录get mac是获取机器网卡地址程序；2. 目录GetIpAddress是根据机器名以及域名获取IP地址程序；3. 目录getlocalip是获取本地机器ip地址程序；4. 目录ping是ping程序代码；5. 目录portscanner是本地机器端口扫描程序，其中扫描可能端口就是扫描计算机上所有可能的端口；6. 目录超级链接是在窗体上实现超级链接到IE和自动发送邮件的程序；-1. Contents get mac is access card machines addresses procedures; 2. Contents GetIpAddress under machine name and IP address of the domain name acquisition procedures; 3. Contents getlocalip is access to local machine ip address; 4. Contents of ping ping code; 5. Contents portscanner local port scanning machines procedures, which may port scanning is scanning your computer all possible port; 6. Contents hyperlinks in Form achieving super link to the IE and automatic mail procedures;

SOCKET 底层协议数据结构 如： /* IP Header RFC-791 0 3 7 15 31 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Version| IHL |Type of Service| Total Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Identification | Flags | Fragment Offset | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Time to Live | Protocol | Header Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Destination Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Options | Padding | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */-SOCKET underlying protocol data structures such as:/* IP HeaderRFC-7910 3 7 15 31+-+-+-+-+-+-+-+-+-+-+-2B !-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+ | Version | IHL | Type of Service | Total Length |+-+-+-+-+-+-+-+--+-+-+-+-+-+-+-+-+-+-+

使用C#编写的WEB浏览器。基本功能齐全。- Uses WEB browser which C# compiles. The basic function is complete.

基于 PHP+MySQL 的网站 BT 发布全套系统，它包括了 BT 服务端的 Tracker 程序和列表发布 Web 界面-the BT website released a complete system, which includes BT services side of the Tracker and tabulation procedures issued Web interface

一个基本的动态域名程序，可在有外网地址的机器上实现动态域名转发。并可实时更新域名ip信息。-a basic dynamic domain procedures, which are outside the network addresses of the machines on the dynamic domain name forward. May ip domain real-time updates of information.

远程自动备份，可配置服务器信息。 采用TCP-WINSOCK多线程实现，可以多对多备份。-Remote automatic backup allows you to configure the server information. Using TCP-WINSOCK realize multi-threaded, you can back up many-to-many.

wmi编技术和控制远程进程,需要认证到相应的机器.-wmi compilation and control of remote process

sap rfc 使用rfc调用R3的销售数据-sap rfc

超市管理系统 能够实现基本的管理功能 界面简单-Supermarket management system enables a simple interface for basic management functions