Since it is virtual hardware, it must be added manually through the wizard: Installing the Microsoft Loopback Adapter in Windows
The —officially renamed the Microsoft KM-TEST Loopback Adapter in newer versions like Windows 11—is a virtual network interface that emulates a physical network card. It allows a computer to communicate with itself using standard network protocols without requiring a physical connection or external network hardware. Key Use Cases microsoft loopback adapter windows 11
Simulating various network scenarios and testing protocol software or device drivers offline. Since it is virtual hardware, it must be