What is the difference between a serial and parallel port?

both serial ports and parallel ports are examples of computer technology that once top; For most of the history of personal computers, the serial and parallel ports were the most common means of data transfer and communication. With technological progress, both serial and parallel ports have largely been replaced by using USB ports and fewer new devices are designed to include a serial or parallel port. Older personal computers that have a serial and parallel port often require an adapter cable to use the latest generation of peripheral devices. Perhaps the main difference between the serial and parallel port is the way the information is communicated: the parallel port is able to transmit information from the hard disk, while the serial port can transmit information to the hard disk and from the hard disk.

parallel ports

of these two, steam port is an older port design with the first use at the beginning of 70. Flight, which allows printers to connect directly to the mainstream computers and print orders by entering the code via the command station. The parallel port allows one -way data transfer from the source to the secondary device, such as the printer. In some circles, the parallel port has become commonly known as the printer port, as this feature was the most common application of the device. The first external modems and storage devices are several examples of wider use of parallel ports. Since the beginning of the 21st century, the parallel port has largely been replaced by a USB port, although some auxiliary devices still allow the connection of both means.

parallel ports generally have at least 25 connectors that make up the actual connecting part of the device. These 25 pins will coincide with the end of the device to which the port is connected, and it is Through pins that the information is transferred. Each PIN connector performs a different function.

serial ports

One key difference limitEven a serial and parallel port is that the serial port allows data transfer to the hard disk from the remote device or transferred from the hard drive to the remote device, unlike outgoing communication only the parallel port; The serial port can also be described as a communication port or two -way port. This two -way communication process allows you to connect workstations to larger terminals and a wide range of peripheral devices such as external hard drives or smartphones. However, it is known that serial ports are slower than parallel ports, as they can transmit information in two directions simultaneously.

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serial port will usually consist of nine or 25 connectors connectors; Several connectors in the port of 25 pins are not regularly used. Originally, the port was believed to make nine pins to make it more compact and more cost -effective, but it was often not effective enough to serve its purpose.