一、因特网的出现为三网的融合提供了结合点九十年代以来,数字化革命带来的深远影响可以概括为三件事:一是数字化导致的数字汇聚和“三网”融合;二是1994年出现因特网以后的因特网冲击;三是在上述两件事的作用之下,通信体制从电路交换向包交换转化。简单的说,由于数字化使得过去几个独立的行业——电信业、广播业和计算机业,它们所经营的内容、传输手段、处理方法都数字化了,出现了一个行业可以做另一行业的事情,导致了行业的汇聚与融合。过去,三个不同网络之间的融合由于采用不同的传输媒体、不同的技术、不同的协议,要从链路层上来联结这三个网几乎是不可能的,互通互连都做不 First, the advent of the Internet has provided a binding point for the convergence of the three networks. The far-reaching impact of the digital revolution since the 1990s has been summed up as three things: first, digital convergence and “triple play” convergence; and second, 1994 The Internet impact after the Internet in the year; the third is the role of these two things, the communication system from circuit switching to packet switching conversion. Simply put, as digitization has led to the digitization of the content, transmission means and methods of operation in the past few independent industries - the telecommunications, broadcasting and computer industries - and the emergence of an industry that can do something in another industry , Led to the convergence and integration of the industry. In the past, the integration between the three different networks due to the use of different transmission media, different technologies, different protocols, from the link layer to connect the three networks is almost impossible, interoperability are do not