There are several serial data interfaces in todays electronics and the RS 232 is a dominant one. However, not many people understand what they actually do. THUNDERBOLT, USB AND HDMI are some of the ports which have come with the new technology. With this new technology, many have assumed that the legacy interfaces are no longer useful. However, there isnt any truth in that. The RS 232 serial data interface is still popular and the oldest in the market. In 1960, there was a recommendation by the Electronics Industries Alliance on the standards to be used for industries. After 2011, the alliance has not been active. it is RS they chose though. The suggestions were quite many and RS 232 was in there too. Given that these were standards agreed for in the whole world, all PCs have RS 232. Even so, it is not a specific component that you can point at. With the ports you see on the PCs, RS 232 does the packaging of the data and receives it. Once the information is received by the RS 232, it then transfers it to any device it has been connected to like a printer or a computing system. This RS 232 is the post office in the world of computers. There are adaptors which serve USB to RS 232. You can check for more here.
Any port that uses the RS 232 data transmission is a serial port. There is a difference between parallel ports and serial ports. For serial ports, the data transmission is one piece after another. However, parallel ports will do data transmission in 8-bit bytes. The RS 232 cable you will find everywhere is the standard serial cable. You can easily identify it by the little screws at the sides and also the fact that it extends from the tower the monitor. This is in printers, computer terminals, barcode scanners, spectrometers and strain tension gauges. They are also found on flat screen monitors, industrial fieldbuses, stenotype, stenograph and also GPS receivers. The data will come through the computer tower, and the RS 232 will transfer it to the monitor through the serial port where it is projected as an image. Even with all the things the RS 232 can do, there are limitations as well. The longest of the RS 232 cable is 3 feet long which means when you have to cover a distance longer than that it will be a challenge for you. However, even the cables available for this kind of work are not very effective. The longer cables are associated with higher risks and functional slowly. In addition, there is the option of multiple device connections with the RS 232 cables.