Mathematically, the network is a kind of graph, which is generally considered as a weighted graph. In addition to the mathematical definition, the network also has a specific physical meaning, that is, the network is an abstract model from a certain kind of practical problems.
In the computer field, the network is a virtual platform for information transmission, reception and sharing. Through it, the information of various points, surfaces and bodies is linked together, so as to realize the sharing of these resources. Network is the most important invention in the history of human development, which has promoted the development of science and technology and human society.
Extended data:
The role of the network:
1, which is convenient for distributed processing.
In the network, a big problem or task can be decomposed into several sub-problems or tasks, which are distributed to different computers in the network for processing and calculation. This distributed processing capability is effective in the research and development of some major projects.
2. Integrated information services
In today's information society, individuals, offices, libraries, enterprises and schools are generating and processing a large amount of information all the time. This information may be words, numbers, images, sounds and even videos, which can be collected, processed and transmitted through the network. Therefore, integrated information service will become the basic service function of the network.
3. Rapid transmission of information
Computer systems distributed in different regions can transmit all kinds of information, exchange data and send emails in time and at high speed through the network, which makes people more closely connected.
4. Improve system reliability
In the network, due to the cooperation and backup between computers, as well as the use of some backup devices, load scheduling, data fault tolerance and other technologies in the network, when a part of the network fails, other parts of the network can automatically take over its tasks. Therefore, compared with stand-alone systems, computer networks have higher reliability.
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