Due to its excessive dependence on the web server, the traditional online foreign-language-teaching system, which is based on the C/S （Client/Server） model, has its born disadvantages and is unable to break through the limitations of server capability and on-demand brand width. The new online teaching system, which adopts P2P （Peer-to- Peer） technique and streaming media technique, can make full use of the brand width and hardware resources of every online node and achieve a synchronous communication and file-sharing among the students or b...
