【摘要】 广播电视网、电信业务网与计算机网是信息产业发展的基础，三网融合则是现代信息技术发展的必然趋势，其最终的物理网络选择是三网融合中需要解决的关键问题之一。笔者认为：广播电视网中的有线电视网络将凭借其自身的优势在不久的将来担当起此重任。

　　【关键词】三网融合 物理网络 有线电视网络

　　ABSTRACT：Tele-Communication network, TV-Broadcast network and Computer network are the base of the modern Information Industry. The development of the modern Tele-Communication techniques will result in the merger of these three networks. Which of them will be the final physical network? I believe that the CATV network, one branch of the TV-Broadcast network, will be the final choice.

　　[key words]the Merger of the three networks physical network CATV network