In computing, a serial port is a serial communication interface through which information transfers in or out sequentially one bit at a time. This is in contrast to a parallel port which communicates multiple bits simultaneously in parallel. A serial port is a general-purpose interface that can be used for almost any type of device, including modems, mice, and printers (although most printers are connected to a parallel port).
Definition of Serial Port
As mentioned above that the serial port is an interface used for attaching the serial lines where the serial communication can be attained. In these ports a 9-pin D shaped connector can be docked which connects to the transmission line. As we know that the serial transmission obtained by a single wire and only a single stream of a bit is transferred from one end to the other end. So, like parallel transmission, there is no data speed mismatch problem. Therefore, the wire length can be extended as required. The below-given diagram shows the DB-9 pin.
Standards followed by Serial port
The serial ports follow the RS-232C or RS-422 standards. We have been using this technology for 20 years, and it is still used in several places.
Implementations of Serial port
There are several applications of the serial port and serial communication where these are mainly implemented in the dial-up modems, mouse, plotters. Nowadays, these are used with the security cameras also.