1, data communication is the most basic function of computer network. It is used to quickly transfer various information between computers and terminals, computers and computers, including letters, news, consulting information, pictures, newspaper layouts, etc.
2. Resource sharing: "Resources" refers to all software, hardware and data resources in the network. "* * * Enjoy" means that all users in the network can enjoy these resources in part or in whole.
3. Distributed processing: When a computer is overloaded or processing a task, the network can transfer the new task to an idle computer to complete it, so that the processing can balance the load of each computer and improve the real-time performance of problem processing.
From the logical function point of view, computer network is a collection of computer systems with the basic purpose of transmitting information and connecting multiple computers with communication lines. A computer network consists of transmission media and communication equipment.
From the user's point of view, a computer network is defined as having a network operating system that can be automatically managed by users. It calls the resources called by users, and the whole network is like a large computer system, which is transparent to users.
Extended data:
A computer network is an autonomous collection of computers interconnected by lines. Specifically, it is a system that connects computers, terminals and their ancillary equipment distributed in different geographical locations with communication equipment and lines, configures network software, and realizes computer resource sharing.
Although there are various standards for the classification of network types, geographical division is recognized as a general standard for network classification. According to this standard, various network types can be divided into four types: local area network, metropolitan area network, wide area network and Internet.
Generally speaking, LAN can only be located in a small area, and MAN is the interconnection of different regional networks. However, it should be noted that the network division here is not strictly defined by geographical scope, but only a qualitative concept. The following briefly introduces these kinds of computer networks.
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