摘要： 将可拓方法应用到广域网不同操作系统间的文件传输中，保持主机在一个网络适配器条件下，根据可拓变换的策略，对不同系统计算机的网络配置进行相关修改，从而提高了文件传输速度，解决了经常出现的中断现象，实现了异构系统的计算机网络资源共享和数据通信。

关键词: 可拓方法；Unix；文件传输；可拓变换

Abstract: In wide area network, it takes long time to transfer files in different systems, and the phenomenon of interrupts often presents in filetransfer. This paper attempts to modify the correlative network configurations in different networks under the condition of just one network adapterwith extension method. Accordingly, the speed of file transfer is enhanced and the sharing of computer resource and data communication inheterogeneous system are realized.

Key words: Extension method; Unix; File transfer; Extension transformation