传统架构中服务器端的压力过大、单一失效点等问题，又能充分利用终端的丰富资源，所以P2P技术被广泛应用于计算机网络的各个应用领域。传统文件传递主要是通过电子邮件或FTP的方式进行，这类方式有很多问题：-Traditional fr a mework of server-side pressure is too large, a single failure point and so on, can take full advantage of the rich resources of terminals, so P2P technology has been widely used in computer networks in various fields of application. Traditional file transfer is mainly by e-mail or FTP manner, such an approach has many problems: