👉 "Loopback" is a term used in software engineering to refer to a network interface that is not part of an operating system's physical hardware. It serves as a bridge between the host machine and its networked devices, allowing communication between them through a common protocol. In programming terminology, "loopback" refers to a device with a loopback address (e.g., 127.0.0.1) that is not part of an operating system's physical hardware but instead serves