主要介绍http通信原理，特别是客户端和服务器的请求和应答流程-Introduces http communication theory, especially the client and server processes requests and responses

silverlight+VS2010实现FTP上传于下载,FTP 采用被动模式PASV方式进行连接，可以实现FTP客户端与FileZilla的通信。-silverlight+ VS2010 FTP upload achieve downloading, FTP passive mode PASV way connection, you can communicate with the FileZilla FTP client s.