The fundamentals of network architecture, why do you need network architecture

Organize the patterns inherent in the data to make it simple and clear. Create information structures or maps so that others can get the knowledge they need.

The computer network structure can be described from three aspects: network architecture, network organization and network configuration.

Network architecture is a functional description, which refers to the collection of computer network hierarchy models and protocols at each layer. Network organization is described from two aspects: the physical structure of the network and the implementation of the network. Network configuration describes the layout, hardware, software, and communication lines of a computer network from the aspect of network applications.

The network architecture has applicability.

In all the research of computer networks, although there will be differences and inapplicability in some specific demand items, it can still meet the requirements of most users for network services, and realize the sharing of network resources and network communication. Network technology basically pursues the realization of long-distance information transmission and long-distance communication and resource sharing.

At the same time, although there will be more or less differences in the coverage of different computer networks, communication media, equipment types, topologies, etc., there must be commonalities in the same objects, for example, the structure of computer networks is unchanged, and the protocol standards are prescribed, but the complexity of different computer networks is different, and the standard protocols used are different.

In the study of network architecture, an important field is to study these universal ideas and common standard protocols in computer networks, and thus establish a set of scientific theoretical research methods with universal characteristics, and a series of practical engineering and technical methods have also been developed. Therefore, the volume structure of the network has the universality to dominate all computer network research.

Computer networks involve multiple aspects of computer technology, communication, and use, which are complex and orderly. The network is ubiquitous in the military, industry, teaching, home, company groups, etc. There is a strict management order in the management of the network.

The computer network system is to connect all computers together through the network to realize information sharing, but it has communication defense and interface services. The convenience of computer networking.

Computer networks have made what appears to be a huge world a whole, but in fact it has made the world seem small. Because through the computer network, people who didn't know each other at all may have known each other, and they didn't understand the problem before, but now they also understand. People can communicate and communicate with each other through computer networks.

Science and technology are the primary productive forces, and scientific production technology has given birth to the growth of the network, and the network has also promoted the progress of science and technology, which can be said to complement each other. The emergence of the network has promoted the change of economic mode and society, but it has also put forward more stringent requirements for the development of the network, and the network has continued to develop in the continuous promotion of society.

Everything needs structure, and the web is no exception.

If the networks of different manufacturers want to be interconnected, they must comply with certain rules, that is, standards. This standard cannot be formulated casually, and it must be considered from various aspects such as security and speed, so it is necessary to specify a reasonable network architecture.

The concept of network architecture is as follows:

Network architecture refers to the overall design of a communications system that provides standards for network hardware, software, protocols, access control, and topology. It is widely used as a reference model for open system interconnection (OSI) proposed by the International Organization for Standardization (ISO) in 1979.

Important concepts involved in network architecture.

1. Protocol: A collection of rules, standards, or conventions established for the exchange of data in a computer network.

2. Communication protocol: The rules and agreements that both parties must abide by are called communication protocols. The understanding of data by both parties needs to be based on agreements and agreements.

3. Interface: The boundary between two adjacent layers, which stipulates the services provided by the lower layer to the upper layer and the formal specification statements (service primitives) used by the services.

4. Service: The function provided by a certain layer can be provided to its adjacent upper layer through the interface.

5. Network architecture: the precise definition of the functions of each layer of the computer network and the collection of protocols that each layer adheres to.

6. Protocol stack: a protocol sequence composed of protocols arranged in hierarchical order at each layer of the network.

7. Point-to-point: It is reflected in the physical connection of two pairs, which is a physical topology, such as optical fiber, which must be a point-to-point connection.

8. End-to-end: embodied in the logical connection of two pairs.

Network structure refers to the structure of a computer network. The computer network is composed of computer systems, communication links and network nodes, and it is a field in which computer technology and communication technology are closely integrated, and it undertakes two types of work: data communication and data processing. From the perspective of logical functions, the network can be divided into resource subnets and communication subnets.

A resource subnet provides the ability to access the network and process data, and it consists of a host computer system, a terminal controller, and a terminal. The communication subnet provides network communication functions, which consists of network nodes, communication links, and signal conversion devices. The structure of the communication subnet in the network directly affects the network structure.

According to the technology of transmitting data, the communication subnet can be divided into two types: point-to-point communication channel and broadcast communication channel.

What is the common network structure for a typical household? Take a few minutes to introduce you.

It can be understood as the hierarchy and shape of the directory structure.

A network architecture is a collection of layers and protocols. The network architecture refers to the overall design of the communication system, which provides standards for network hardware, software, protocols, access control, and topology office rubber rulers.

1. Classification of Protocol Definitions.

1. Network architecture: It is the level of communication between computers, as well as the collection of protocols and interfaces between layers.

2. Network protocol: It is a collection of rules that must be followed when exchanging information between computer networks and peer-to-peer entities that communicate with each other in the distribution system.

3. Syntax: including data format, coding and signal level.

4. Semantics: including control information for protocol and error handling.