The line interface is the external interface of serial communication. The line interface is the external interface of serial communication. Serial communication means that one line is used for data transmission, and data can only be transmitted according to the clock signal, just like a candied haws. In contrast, parallel communication is that multiple lines are transmitted at the same time, and the speed is fast. Both serial and parallel interfaces are commonly used communication interfaces for computers, which are connected to external devices of computers. When the serial port communicates, the data is a series, that is, only a single binary digit 0 or 1 can be transmitted at the same time, and parallel can transmit N 0 or 1 at the same time, such as the commonly said 8-bit, 16-bit, 32-bit, 64-bit, etc. If your mobile phone is a serial port communication method, it can only be connected to the serial port. Generally, the serial port needs to install the driver, which is the driver in the CD that comes with the mobile phone. In computers, there are two ways of data transmission: one is serial communication, in which the binary bits of each character are transmitted in bit arrangement, which is slow but has a relatively long transmission distance. The mouse port and USB port are both serial ports; the other is parallel communication, in which the binary bits of each character are transmitted simultaneously using multiple data lines, which has a relatively faster transmission speed but a relatively short transmission distance. This method is generally used for data transmission inside computers, and the standard printer port is a parallel port. …
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