2. Transmission speed: The transmission speed of modern information is much higher than that of ancient times. In ancient times, the fastest way was to send books by flying pigeons or fast horses, which also took several days. But in modern times, the Internet can make information real-time.
3. Diversified transmission functions: In addition to the basic functions of data collection, transmission, storage and management, modern information transmission can also provide users with information services such as information retrieval, statistical report, transaction processing, planning, design, command, control, decision-making, alarm, prompt and consultation.
The characteristics of modern information transmission are:
1, involving a large amount of data. Generally, data need to be stored in auxiliary memory, and only a small part of the data to be processed is temporarily stored in memory;
2. Most of the data is persistent, that is, it does not disappear with the end of the program, but needs to be stored in the computer system for a long time;
3. These persistent data are shared by multiple applications, even in a unit or a larger scope.