当代信息高技术领域的微电子、光电子、计算机、现代通信等四大前沿技术不断进步,为计算机网络奠定了技术和物质基础,推动了网络时代的到来。由于社会对信息的需求日益增长,功能最强大的单台计算机也不能胜任大规模的信息采集、处理、存储和传输的任务。科学家和工程师们认为有必要 The four cutting-edge technologies such as microelectronics, optoelectronics, computers and modern communications in the field of high-tech contemporary information have been making continuous progress, laying the technical and material foundation for the computer network and promoting the advent of the Internet age. Due to the growing demand for information in society, the single most powerful computer can not perform the tasks of large-scale information collection, processing, storage and transmission. Scientists and engineers think it is necessary