What is the most common plug and port used in networking?

The most common plug and port used in networking is the RJ45 plug and RJ45 port. This standard is specifically designed for connecting devices in local area networks (LANs) such as computers, routers, and switches.

The RJ45 connector is used with twisted pair cabling, which is the most prevalent type of wiring in networking due to its ability to effectively transmit data at high speeds while minimizing interference. When devices are connected with an RJ45 plug and port, they can communicate over Ethernet protocols, allowing for robust data transfer and connectivity.

In contrast, while USB connectors are widely used for connecting peripherals, they are not the standard for network communications. HDMI is primarily used for audio and video transmission, making it unsuitable for general networking needs. ADSL is a type of internet connection, but it relies on different types of connectors and is not as commonly used as the RJ45 for networking applications.