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An Ethernet computer port, also known as a LAN port or an RJ45 port, is a physical connection used for wired networking. It's a rectangular socket with a latch that allows an Ethernet cable to be securely plugged in, enabling high-speed, stable data transfer between your computer and a network or the internet.

Shape and Size: It is a rectangular-shaped port, larger than a telephone jack, with a specific shape to accept the corresponding Ethernet plug.

Internal Components: Inside, you'll find eight metallic contact wires that connect with the pins on the Ethernet cable plug.

Latching Mechanism: The port includes a small recess that engages with a clip on the Ethernet cable's plug, ensuring a secure connection.

How It Works

Physical Connection: You insert an Ethernet cable into the port, and the plug's latch secures it in place.

Data Transmission: The port is connected to a Network Interface Controller (NIC) in your computer, which allows it to send and receive data packets over the wired connection.

Purpose: This establishes a reliable, stable, and often faster connection compared to wireless methods like Wi-Fi.