Serial Port ( Serial Port) The port for connecting serial communication devices is called Serial Port. Develops port at Electronics Industry Association (EIA) . Serial devices exchange data through serial ports. Serial ports typically identify hardware that is more or less compatible with the RS-232 standard. Output peripherals like monitors , printers , modems, etc. are connected to the computer's input / output port in a serial interface system. Serial port can be either Male or Female . The VGA port is also a serial port. Serial ports are now largely replaced by USB and FireWire ports. In the case of MS-DOS, it is used as COM1 and COM2 . Serial port has a total of 9 pins. Examples of modem and mouse serial communication devices.