To start off, an interface, in this context, is a data path between two separate devices in your computer. Now we will move on to specific types of buses and interfaces. A type of interface in which only 1 bit of data is transferred at a time. Mice and modems are usually connected to serial ports, which are also referred to as COM ports. A type of interface that allows more than 1 bit of data to be processed at once.
Printers are the most common peripheral devices connected to parallel ports.
A new type of external bus contending to replace serial and parallel ports. Because of this, FireWire is suitable for connecting video devices, such as VCRs, to the computer. A type of parallel interface that is commonly used for mass storage devices. This is a commonly used interface for hard disk drives and CD-ROM drives. It is less expensive than SCSI, but offers slightly less in terms of performance.