An Ethernet port is a connector or socket on a computer that allows the use of an Ethernet connector. These ports are essential to allow the creation of local area networks (LANs). An Ethernet port is often found on network devices, including computers, routers, game consoles, modems, and televisions.
An Ethernet cable.
Ethernet is a communication system that allows multiple local devices to share information and work together. For example, in an office there may be six employees, each with their own computer, and they all need access to the same databases, programs, and external devices such as printers and scanners. By connecting each device to a central server or hub using Ethernet technology, all devices will be able to access the same information and effectively “talk” to all other devices on the network.
Ethernet cables connected to an internet switch.
An Ethernet port allows for networking using wired connections. This plug, which looks a lot like a large phone jack, allows for the insertion of an Ethernet cable. Ports and cables are typically only used to connect devices that are in close proximity, such as in the same building, due to the impracticality of running miles of cabling across the city or hundreds or thousands of miles of cabling across continents. Devices like computers and printers often have one port that allows them to join a network, while network devices like modems can have multiple ports to allow multiple components to connect.
A wireless router with a cable connected to the Ethernet port.
Devices that do not have a physical port can still allow connection to an Ethernet network in one of two ways. First, many newer computers have a built-in Ethernet card, which enables the creation of wireless Ethernet networks that don’t require wiring, replacing wireless technology. Second, for devices without an Ethernet card or dedicated port, a port can sometimes be created by connecting an Ethernet adapter, or “dongle,” to a USB port.
One disadvantage of a physical Ethernet port is its susceptibility to damage and difficulty in repair. It is important to be very careful when inserting or removing a cable from the port, as physical elements of the port may be damaged. Repairing an Ethernet port often requires returning the device to the manufacturer or an electronics repair service, which can be prohibitively expensive. Some people choose to simply bypass a broken Ethernet port instead of buying an Ethernet dongle and connecting to the network using a USB port. This quick fix may not always be possible, as not all USB ports on all devices are capable of using an Ethernet adapter.
Printers usually have an Ethernet port.
