Pinout Options for RJ-45 Connectors

The RJ-45 connectors have clips on the side that allow you to easily insert the connector into the plug (hole) in the networking card in a computer. At that point, the connector is secure and should stay put. If you push the clip close to the rest of the connector, it releases the connector from the card. So, the clip helps keep the connector secure and allows you to pull the connector out when you are ready.

So, why does all this matter? In the next few pages, it will all come together as you see how NICs try to use the cables and wires.