Old computers came with many ports that are no longer used today. An excellent example of this is the parallel ports that the printer was normally connected to that are now completely gone. But even though these devices have come back to life, the serial port is still found in many modern computers. Do you know why?
Remember this port, which is still found on many computers?
Before moving on to this question, know that the S in USB stands for Serial or Series. This means that the USB port is technically a serial port. However, what we are referring to is the 25-pin or 9-pin port that has been in personal computers for many decades. Modern serial ports tend to be a 9-pin version, and the shape and size of the port is very similar to the (almost old) VGA port.
No matter how many pins there are on the serial port, it still transmits data one bit at a time in serial form. Hence the name “serial port” or serial port. Different ports on a serial port can have different functions, such as sending control signals or monitoring data from your connected device.
Serial ports are slow, with maximum speed peaking at just 115.2 Kbps. At this speed, it would take about a day to transfer 1GB of data! And this is under ideal conditions.
So, if USB ports are so much faster than serial ports, why are they still found in so many computers?
From the beginning, many industrial and scientific equipment still in service have used serial ports for communication.
It is simple, reliable and cheaper to implement. In addition, those who program microcontrollers need these ports.
However, although it is still used today, people who mostly use computers only to play do not use it.
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