![]() While interfaces such as Ethernet, FireWire, and USB also send data as a serial stream, the term serial port usually denotes hardware compliant with RS-232 or a related standard, such as RS-485 or RS-422. Throughout most of the history of personal computers, data has been transferred through serial ports to devices such as modems, terminals, various peripherals, and directly between computers. ![]() This is in contrast to a parallel port, which communicates multiple bits simultaneously in parallel. ![]() On computers, a serial port is a serial communication interface through which information transfers in or out sequentially one bit at a time. Communication interface transmitting information sequentiallyĪ male D-subminiature connector used for a serial port on an IBM PC compatible computer along with the serial port symbol
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