The arrangement of this paper is as follows : chapter one makes brief explication of the development of ethernet technology , ieee802 . 3 models , cable tv network technology , development trend of the integration of three networks 本文的安排如下:第一章对以太网技术的发展、 ieee802 . 3参考模型、有线电视网络技术的发展、三网合一的发展趋势作简要阐述。