计算机联机系统出现时,考虑了系统之间的数据交流非常有用,希望计算机之间进行结合,因而后来产生了计算机网络。以后,在这一方面进行了各种研制工作。计算机网络的意义是重大的。1969年的ARPA网出现以后已把它作为一个领域来考虑。同时,作为实际的计算机网络,作为具体的实践而确定下来也只是在ARPA网完成以后。 Computer online system appears, considering the exchange of data between systems is very useful, hope that the combination of computers, which later produced a computer network. Later, various research and development work was carried out in this area. The significance of computer networks is significant. The ARPA network of 1969 appears to take it as an area for consideration. At the same time, as a practical computer network, as a concrete practice to determine it only after the completion of the ARPA network.