Host refers to the main part of the computer except the input and output devices. It is also the control host for placing main components such as the motherboard. It usually includes CPU, memory, motherboard, CD-ROM drive, power supply and other input/output controllers and interfaces. In network technology, it is about the terminal equipment that sends and receives information.
In a data communication system, a computer specially used to complete various data processing. The host can complete basic types of data processing: message storage and forwarding; Collect, edit and distribute data; , file management and processing, remote job input, batch processing, real-time processing and interactive time-sharing processing.
Extended data:
The host computer in a data communication system is different from the general stand-alone system, and its main features are:
1, communication type, with communication and processing skills. In terms of hardware, it has input/output channel components or bus interfaces connected with the communication controller.
The system software has the functions of analyzing and handling CPU hardware interrupts, controlling input/output and error recovery, starting and stopping programs, multiprocessing and managing virtual memory. The communication control program (communication software) is usually combined with the communication controller to control the data transmission between the user's online business program and the remote terminal.
2. It has the function of database management. Database is a collection of interrelated data, which has the characteristics of data sharing, independence and minimum redundancy, and manages the data in a unified way. One of the most important applications of computer network is to establish geographically dispersed databases among hosts in the network. Hosts support users to access local or remote databases through database management systems.
3. In order to ensure high reliability, the reliability of the main machine should be high, and a standby machine can be set up or a dual-machine working mode can be adopted.
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