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计算机网络,就是通过数据传输通信网,把在地理上分布很广的一台或多台计算机以及作为输入/输出用的各种终端设备连接起来的系统。它的出现是计算技术发展中的一项重大突破,打破了那种只有在某一台计算机旁边才可以使用该台计算机的传统方式。有了计算机网络之后,人们只要有一台连接到网中的终端设备,就可以通过操作这台终端而使用网络中任何一台哪怕是远隔千里的计算机了。而且网络中的所有计算机都可以彼此交换信息,共同享用网络中所有的软件、硬件、数据等资源。为人们提供了性能好、
A computer network is a system that connects one or more geographically distributed computers and various terminal devices for input / output through a data transmission network. Its emergence was a major breakthrough in the development of computing technology, breaking the traditional way of using the computer only alongside a computer. With a computer network, as long as there is a terminal device connected to the network, people can use any one even a thousand miles away from the network by operating the terminal. And all the computers in the network can exchange information with each other to share all the software, hardware, data and other resources in the network. Provide people with good performance,