The four functions of a computer network, what are the functions of a computer network

The main functions of computer networks include data communication, resource sharing, centralized management, enabling distributed processing, and load balancing. The details are as follows:

1. Data communication:

Data communication is one of the most important functions of computer networks. Data communication is based on a certain communication protocol.

A communication mode and communication service that uses data transmission technology to transmit data information between two terminals. It can realize the transmission of data and information between computers and computers, computers and terminals, and terminals and terminals, and is the third largest communication service after telegraph and ** service.

Another feature of data communication is that it is always associated with telematics, which is a generalized information processing that includes scientific computing, process control, information retrieval, etc.

2. Resource sharing:

Resource sharing is one of the main purposes for people to build computer networks. Computer resources include hardware resources, software resources, and data resources. The sharing of hardware resources can improve the utilization rate of equipment and avoid repeated investment in equipment, such as using computer networks to establish network printers; The sharing of software resources and data resources can make full use of existing information resources, reduce labor in the process of software development, and avoid duplicate construction of large databases.

3. Centralized management:

Computer Network Technology.

The development and application have made changes in modern office methods and management. At present, there are many management information systems and office automation systems.

Through these systems, centralized management of daily work can be realized, work efficiency can be improved, and economic benefits can be increased.

4. Implement distributed processing

The development of network technology has enabled distributed computing.

It is possible. For large problems, they can be divided into many small problems, which are completed separately by different computers, and then concentrated to solve the problem.

5. Load balancing

Load balancing is when work is evenly distributed among computer systems on the network.

The network control center is responsible for distribution and detection, and when a computer is overloaded, the system automatically shifts the load to a lighter computer system for processing.

It can be seen that the computer network can greatly expand the function of the computer system, expand its application range, improve reliability, provide convenience for users, and also reduce the cost and improve the performance ratio.

The above content reference: Encyclopedia - Computer Network.

The functions of a computer network mainly include the following:

Data communication: one of the basic functions of computer network, which can realize data transmission between computers and terminals and computers, and is the most basic function of computer networks and the basis for realizing other functions.

Resource sharing: The main purpose of a computer network is to share resources. The resources that can be shared include hardware resources, software resources, and data resources.

Among them, hardware resources include processors, large-capacity memory, printing equipment, etc., and software resources include various application software, system software and data.

Data processing: Through the distributed processing function of computer networks, large problems can be broken down into many small problems, which can be completed separately by different computers, and then concentrated to solve the problem.

Load balancing: By distributing the work evenly across the computers on the network, the reliability and performance of the system can be effectively improved.

Promote the development of distributed databases: The development and application of computer network technology have enabled the realization of distributed database systems. This database system can disperse data to various computers and then centrally manage it through the network, improving the security and reliability of data.

Improve reliability: computer networks are distributed control, if there are components or a small number of computers fail, because the same resources can be distributed on different computers, so that the network can access these resources through different routes, does not affect the user's access to the same kind of resources.

In general, computer networks have functions such as data communication, resource sharing, data processing, load balancing, facilitating the development of distributed databases, and improving reliability. These functions have enabled computer networks to be widely used in various fields and profoundly changed the way people live and work.

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The functions of computer networks are mainly reflected in three aspects: resource sharing, data communication, and distributed processing.

1. Resource sharing: In a computer network, various resources can be common to each other, and users can jointly use the software, hardware, and data in the network.

Resource sharing also includes: hardware resource sharing, software resource sharing, and information resource sharing.

2. Data communication: The computer network can realize the data transmission between the computers, and the data can be centrally and decentralizedly managed according to the needs.

3 Distributed processing: When a computer system in a computer is overloaded, the tasks it processes can be transferred to other idle computer systems in the network to improve the utilization of the entire system.

Basic Functions of Computer Networks:

1.Communication.

Data communication is the basic function of computer network, which can realize data transmission between computers and terminals and computers in different geographical locations.

2.Resource sharing.

Resource sharing includes the sharing of software, hardware, and data resources in a network, which is the most important and attractive feature of computer networks.

3.Centralized management.

4.Distributed processing.

5.Load balancing.

6.Integrated information services.

1. Hardware resource sharing.

It can provide the sharing of expensive equipment such as processing resources, storage resources, input and output resources on the whole network, so that users can save investment, and it is also convenient for centralized management and balanced load sharing.

2. Software resource sharing.

Users on the Internet are allowed to remotely access all kinds of large databases, and can obtain network file transmission services, remote process management services and remote file access services, so as to avoid duplication of work in software development and duplicate storage of data resources, and also facilitate centralized management.

3. Information exchange between users.

Computer networks provide a powerful means of communication for users who are distributed across the globe. Users can send e-mails, publish news messages, and conduct e-commerce activities through computer networks.

4. Load balancing and distribution processing.

Load balancing refers to distributing the workload in a network evenly across the various computer systems in the network. When the load of a host on the network is too heavy, through the control and management of the network and some applications, the task can be handed over to other computers on the network to deal with, and the role of each host on the network system can be fully utilized. Distributed processing divides the processing of a job into three phases:

Provision of assignment documents; processing of the operation; Output the processing result. In a stand-alone environment, all three steps are performed in the local computer system. In the network environment, according to the needs of distributed processing, the job can be assigned to other computer systems for processing, so as to improve the processing capacity of the system, and efficiently complete the program calculation of some large-scale application systems and the access of large-scale databases.

5. The safety and reliability of the system.

The reliability of the system is particularly important for applications in sectors such as military, financial, and industrial process control. Computers can greatly improve reliability through redundant parts in the network. For example, if one machine fails during work, another machine in the network can be used; If one communication line fails in the network, another line can be routed, thus improving the reliability of the overall network system.

Computer network functions mainly include:

1. Realize resource sharing.

All users can enjoy all or part of the software, hardware and data resources of each computer system in the network, which is the most essential function.

2. Improve performance.

Each computer in the network can become a backup machine for each other through the network. Once a computer fails, its tasks can be completed by other computers, so as to avoid the phenomenon that the whole system is paralyzed due to the failure of a computer in the case of a single machine, so as to improve the reliability of the system.

When a computer in the network is overburdened, the network can offload new tasks to the less idle computer, equalizing the load, thus improving the availability of each computer.

3. Distribution processing.

Large-scale comprehensive problems are handed over to different computers to be processed simultaneously through algorithms. Users can reasonably select network resources according to their needs and quickly process them nearby.