Sometimes it is also known as RS-232 port or COM port, and its data transfer rate is slower as compared to a parallel port. The below picture is an example of a DB9 serial connector on a cable. Modern serial ports are used in industrial machinery systems and scientific instruments and are usually found on IBM-compatible computers as COM (communications) ports. For instance, a modem might connect to communication port 1 and a mouse to communication port 2. It is commonly used to connect peripherals such as game controllers and mice to a computer, and it was once used to connect printers and external modems. It is a type of connection on PCs, which is one of the oldest types of interfaces. ![]() ![]() A serial port on a computer is an asynchronous port that connects a serial device to the computer and allows the computer to transfer or receive data one bit at a time.
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