Computer Science · Ch 10 — Computer Networks
RJ45
RJ45
The RJ45 connector is the physical interface used to connect devices to a network cable. It is the most common type of connector for Ethernet networking, and you will find it at the ends of every twisted-pair cable (like Cat5e, Cat6) used in a Local Area Network.
The name "RJ45" stands for Registered Jack 45. It is a standardised physical interface, meaning that any RJ45 plug will fit into any RJ45 socket, regardless of the manufacturer. This standardisation is what makes it so widely used.
Physically, the RJ45 connector is a clear plastic plug that looks like a wider, larger version of a telephone connector (RJ11). It has eight pins (electrical contacts) arranged in a row inside the plug. When you push the plug into a port on a computer, switch, or router, a small plastic tab on the top of the plug clicks into place, locking the connection securely.
The eight pins in an RJ45 connector correspond to the eight wires inside a twisted-pair Ethernet cable. Each pin connects to a specific wire, and the way these wires are arranged (the wiring standard, like T568A or T568B) determines how the signals travel. …
Drawn by us to help you understand the concept clearly, and verified to make sure it's accurate. For exams, practice from your NCERT textbook's own diagram.
RJ45 is the standard connector used to plug an Ethernet cable into a device — into a NIC on one end and into a switch, router, or wall socket on the other. Inside the clear plastic housing you can see 8 individual gold pins, one for each of the 8 wires bundled inside a typical network cable. …