英语翻译A network,in computer science,is a group of computers an

英语翻译
A network,in computer science,is a group of computers and associated devices that are connectde bu communications facilities.A network can involve permanent connections ,such as cables,or temporary connections made through telephone or other communications links.A network can be as small as a local area network consisting of a few computers,printers and other devices,or it can consist of many small an large computers distributed over a vast geographic area.Small or large,a computer network exists to provide computer users with the means of communicating and transferring information electronically.Some types of communication are simple user-to-user messages;others,of the type known as distributed processes,can involve several computers and the sharing of workloads or cooperative efforts in performing a task.