What does a parallel port look like?

One of your customers needs to move their old printer from one computer to another, and they tell you that this printer uses a parallel port to interface to the computer. How many pins does the parallel port have on the computer’s motherboard?

A) 9

B) 15

C) 25

D) 36

The answer: C) 25

The parallel port is most commonly seen as a female DB-25 connector. Older devices may also use a 25-pin connector for the serial port, but those are commonly differentiated as male connectors on the back of the computer.

Want to know more? Watch “Motherboard I/O Connections.”

All motherboards have input and output ports on the back, but what do all those connections mean? In this module, we’ll turn the PC around and show you exactly how each port works and how to instantly recognize the most common input and output connections.