Traditional Culture Encyclopedia - Traditional culture - What does the data communication system model generally include?
What does the data communication system model generally include?
In the data communication system, the equipment used to send and receive data is called data terminal equipment (DTE). DTE may be a large, medium or small computer or a printer that only receives data, so DTE belongs to users.
There are many kinds of them and their functions are quite different. From the point of view of computer and computer communication system, terminal is an input/output tool; From the point of view of data communication network, computers and terminals are both called network data terminal equipment, referred to as terminals for short.
In the composition of data terminal, the input/output devices are well understood, and the communication controller is worth mentioning. Because data communication is between computers or between computers and terminals, in order to communicate effectively and reliably, both parties must follow certain rules, such as synchronization, error control, establishment, maintenance and deletion of transmission links, and data flow control. This function is completed by the communication controller in the network. Realizing the above functions in the communication controller is not realized by hardware like traditional telephone communication,
In the data communication of computer network, the communication controller is realized by a kind of software called "protocol". Different networks may have different protocol software in the communication controller.
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