A dual Ethernet card (or Dual NIC) is a hardware expansion that adds two independent network ports to a computer, typically through a slot. This guide covers why you’d use one and how to set it up. 1. Why Use a Dual Ethernet Card?

: Power down your PC and unplug it. Touch a metal part of the case to discharge static electricity.

Adding a second (and third) port provides several advanced networking capabilities:

: Intel chipsets (like the i350 or X540) are highly recommended for stability and driver support, especially in Linux/Server environments.

: You can combine both ports to increase total bandwidth (e.g., two 1Gbps ports acting as one 2Gbps link).

Once installed, both ports will appear in your menu: Windows 11 How to add a second IP address to a network card