what is network

A network is composed of several nodes and links connecting these nodes, representing many objects and their interconnections.

Before 1999, people generally believed that the structure of the network was random. But after Barabasi and Watts discovered the scale-free and small-world properties of the network respectively in 1999 and published their findings in the world-famous "Science" and "Nature" magazines, people realized the complexity of the network. sex. (Recommended learning: web front-end video tutorial)

The network will use software tools such as text reading, picture viewing, audio and video playback, downloading and transmission, games, and chat to transform text, pictures, Sound, video and other aspects bring people extremely rich life and wonderful enjoyment.

The concept of network

A circuit or a part of a circuit.

In Chinese, the word "network" was first used in electricity. "Modern Chinese Dictionary" (1993 edition) gave this explanation: "In an electrical system, a network composed of several components is used to make electrical signals A circuit or a part of such a circuit that transmits according to certain requirements is called a network."

In mathematics, a network is a kind of graph, which is generally considered to specifically refer to a weighted graph. In addition to mathematical definitions, networks also have specific physical meanings, that is, networks are models abstracted from a certain type of practical problem. In the computer field, the network is a virtual platform for information transmission, reception, and sharing. It connects information from various points, surfaces, and bodies together, thereby realizing the sharing of these resources. The Internet is the most important invention in the history of human development, improving the development of science and technology and human society.

Network transmission medium

Cable network, optical fiber network, wireless network, LAN usually use a single transmission medium, while metropolitan area network and wide area network use multiple transmission media.

Classified by communication method:

Point-to-point transmission network, broadcast transmission network

Classified by the purpose of network use:

Shared resource network, data processing network, data transmission network, the purpose of network use is not unique.

Classification by service mode:

Client/server network, peer-to-peer network

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