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计算机网是通过数据传输·交换网把广泛分布的多种多样的信息处理装置、大容量存储器、数据库、各种输入输出装置互连而成的系统。这样的系统是计算机应用普遍化、高度化、多样化以及计算机、数据通信、信息检索、系统技术进步的结果。建立计算机网通常有两个主要目的:一种是以传递数据、收集和递送信息为目的;一种是以共用相互的计算机资源(硬件、软件、数据等)为目的。自然,前者是后者的条件,共享资源的网络必然也能收集和传递信息,而以计算机间通信为主要目的网络本身也潜在有发展成共享资源计算机网的条件。为了在功能上区分这两类计算机网,目前往往
The computer network is a system in which a wide variety of widely distributed information processing devices, mass memories, databases, and various input / output devices are interconnected through a data transmission / switching network. Such a system is the result of the universality, high degree of diversification and computer technology, data communication, information retrieval and system technology advancement of computer applications. There are two main purposes for setting up a computer network: one is for data delivery and collection and delivery of information; the other is for the purpose of sharing mutual computer resources (hardware, software, data, etc.). Naturally, the former is the latter condition. Networks sharing resources must also be able to collect and transmit information. The main purpose of inter-computer communication is itself the potential for the development of a resource-sharing computer network. In order to distinguish between these two types of computer networks function, at present