An RJ45 connector is a standardized interface for network cabling, commonly used for Ethernet connections. 
It is a connector that connects devices like computers, routers, and switches to a network. 
RJ45 splitters allow two devices to share an Ethernet line, but typically not simultaneously. 
These are useful for expanding network capabilities by connecting multiple devices. 
RJ45 connectors are used in home and office networking, data centers, and industrial settings. 
The term "RJ45" refers to the registered jack standard and the specific 8-pin configuration. 
The connectors are made of plastic housing with metal contacts, usually gold-plated for better conductivity. 
They are easy to install, reducing the difficulty of setting up network connections.