Table of Contents of Computer Networks and Communications, Introduction to Computer Networks and Com

The content of Computer Networks and Communications covers the basic concepts, principles, technologies and applications of computer networks and data communications, and reflects the latest progress of data communication and computer network technology. It mainly includes computer network overview, data communication basics, network architecture, local area network, communication network and wide area network, network interconnection technology, Internet, network operating system, network management and security technology, network comprehensive experiment, etc.

Computer Networks and Communications" is rigorous, novel and lush, focusing on the elaboration of basic principles and basic concepts, emphasizing the integration of theory with practice, and highlighting the application of technology and practice. It can be used as a textbook or reference textbook for senior undergraduate students and graduate students majoring in computer and related majors in colleges and universities, and can also be used as a reference book for scientific and technological personnel and engineering and technical personnel engaged in computer network and data communication.

Computer networks can be divided according to different standards such as network topology, network jurisdiction and interconnection distance, network data transmission and network system owners, and different service objects. Generally, according to the network scope, it is divided into:

1) Local Area Network (LAN); (2) Metropolitan Area Network (MAN); (3) Wide Area Network (WAN). The geographical scope of a local area network is generally within 10 kilometers, and it belongs to a small area network formed by a department or a group of groups, such as a school, a unit or a system. The wide area network involves a large area, generally from tens of kilometers to tens of thousands of kilometers, such as a city, a country or an intercontinental network, at this time, the transmission device and medium used for communication are generally provided by the telecommunications department, which can achieve a large range of resource sharing.

A metro network sits between a LAN and a WAN, and its range usually covers a city or region, ranging from tens of kilometers to hundreds of kilometers.

A computer network consists of a set of nodes and links. There are two types of nodes in a network: transit nodes and access nodes.

Communication processors, concentrators, and terminal controllers are transfer nodes that transfer and exchange information in the network. The host computer and terminal are the access nodes, and they are the source nodes and destination nodes for information transmission.

Computer network technology is the product of the combination of communication technology and computer technology. Communication technology and communication network system is the basis for building equipment automation and office automation to realize the communication function of intelligent buildings, and through a variety of communication network subsystems and corresponding various communication technologies to receive, store, process, exchange, transmit and other information from inside and outside the intelligent building, such as reception, storage, processing, exchange, transmission, etc., people do not provide satisfactory communication and control management needs.