What does Ethernet use?

Which port type is most commonly associated with an Ethernet connection?

A) RJ-11

B) RJ-45

C) DB-9

D) FireWire

E) Tawny

The answer: B) RJ-45

The Registered Jack number 45 is most commonly associated with copper Ethernet connections using unshielded twisted pair (UTP) cable.

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

If you look at the back of any computer, you’ll find many different ports staring back at you. In this video, you’ll learn to recognize some of the most common motherboard ports and connectors, including audio ports, video ports, and communication interfaces.