In simple terms, RJ45 is the interface or port, while Cat 5 is the cable type. One end of the Cat 5 cable is equipped with an RJ45 connector which allows it to be plugged into the RJ45 port of networking devices.
Cat 5 cables and RJ45 connectors are commonly paired together, but they are not interchangeable. You cannot use a different type of connector with a Cat 5 cable or a different type of cable with an RJ45 connector and expect them to work properly.
Here's a breakdown of their functionality:
RJ45: The RJ45 connector has a plastic housing and contains eight positions for wires, each with metal contacts inside. It is designed to fit snugly into the corresponding RJ45 port. The connector's purpose is to provide a secure and stable connection between networking devices, ensuring reliable signal transmission.
Cat 5: Cat 5 is a type of Ethernet cable consisting of four twisted pairs of copper conductors. Each conductor is individually insulated, and they are then twisted in pairs to reduce electromagnetic interference (EMI) and improve signal quality. Cat 5 cables are designed to transmit data at a maximum speed of 100 Mbps and can be used for a variety of network applications.
When connecting networking devices like computers, routers, and switches, it's crucial to use the appropriate combination of RJ45 connectors and Cat 5 cables. Properly connecting these components will ensure efficient data transfer and maintain the reliability of your network infrastructure.