Computer networks can be divided into what types according to the scope of their coverage

Computer networks can be divided into: 1. Local area network, which can be used in a small area, and the coverage is usually limited to 10 kilometers; 2. Metropolitan area network, whose scope is Between WAN and LAN, the coverage can usually extend to the entire city; 3. WAN, a long-distance network, involves long-distance communication, and the coverage can be a country or multiple countries, or even the entire world.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer.

Computer networks can be divided according to their coverage scope. Why

Computer networks have the following two commonly used classification methods. Classified by transmission technology, it can be divided into broadcast network and point-to-point network; classified by geographical scope, it can be divided into local area network (LAN), metropolitan area network (MAN) and wide area network (WAN).

1. Local area network (LAN). A local area network is a network composed of multiple computers used in a small area. The coverage is usually limited to 10 kilometers, and it is a small-scale network established by a unit or department.

2. Metropolitan Area Network (MAN). A metropolitan area network is a network that functions between a wide area network and a local area network. Its network coverage can usually extend to the entire city. With the help of communication optical fibers, multiple local area networks are connected to the public city network to form a large network, so that not only the resources within the local area network can be shared, Resources between LANs can also be shared.

3. Wide Area Network (WAN) Guangcheng Network is a long-distance network that involves long-distance communications. The coverage can be a country or multiple countries, or even the entire world. Since the geographical distance of wide area networks can exceed thousands of kilometers, information attenuation is very serious. This type of network generally requires leased dedicated lines and is connected through interface information processing protocols and lines to form a mesh structure to solve the routing problem.

Expand knowledge

Computer network refers to multiple computers and their peripheral devices with independent functions in different geographical locations. A computer system that is connected through communication lines and realizes resource sharing and information transmission under the management and coordination of network operating systems, network management software and network communication protocols.

Computer networks are mainly interconnected by some general-purpose, programmable hardware that is not designed to achieve a specific purpose (for example, transmitting data or video signals). These programmable hardware can be used to transfer many different types of data and support a wide and growing number of applications.

Computer network is also called computer communication network. The simplest definition of a computer network is: a collection of interconnected, autonomous computers that share resources. If this definition is used, the early terminal-oriented networks cannot be regarded as computer networks, but can only be called online systems (because many terminals at that time cannot be regarded as autonomous computers). But as hardware prices fall, many terminals have a certain degree of intelligence, so the strict boundaries between "terminals" and "autonomous computers" are gradually lost. If a microcomputer is used as a terminal, according to the above definition, the early terminal-oriented network can also be called a computer network.

In addition, from a logical function point of view, a computer network is a collection of computer systems that use communication lines to connect multiple computers for the basic purpose of transmitting information. A computer network consists of transmission media and communication equipment.

From a user's perspective, a computer network is defined as follows: there is a network operating system that can be automatically managed by the user. It calls the resources called by the user, and the entire network is transparent to the user like a large computer system.

A more general definition is: using communication lines to connect geographically dispersed computer systems and communication equipment with independent functions in different forms, and realizing resource sharing and communication with fully functional network software and protocols. information transfer system.

Generally speaking, a computer network is a system that interconnects computers distributed in different geographical areas with specialized external devices using communication lines to form a large-scale and powerful system, so that many computers can communicate with each other conveniently. Information, sharing hardware, software, data information and other resources. Simply put, a computer network is a collection of many autonomous computers interconnected by communication lines.

The simplest computer network has only two computers and a link connecting them, that is, two nodes and a link.

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