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.

• 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。