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USB ports, how many do you recognize
USB (Universal Serial Bus): a serial bus standard, but also an input and output interface specifications, has developed into an industry standard interface and one of the necessary interfaces, is widely used in 3C digital products, smart phones.
Advantages: fast transmission speed, easy to use, support for hot swapping, flexible connection, independent power supply, known as the universal interface.
Hot swapping: refers to the operation of inserting (connecting) or pulling out (disconnecting) certain components without turning off the power.
The standard of USB was jointly customized in 1995 by a number of companies, including Intel, Microsoft, Compaq and IBM.
The emergence of USB makes data transfer easier and solves the compatibility problem of input and output between different devices.
It has now developed to USB version 4.0, successfully replacing serial and parallel ports, and becoming one of the standard expansion interfaces and essential interfaces for a large number of computers and intelligent devices in the 21st century.
