XNet

XNet is a term that has been employed in several distinct technical contexts to denote network-related technologies and platforms. In its earliest usage, XNet referred to a proprietary packet‑switching protocol developed in the late 1980s by the company XSystems for use in high‑speed data communication between mainframes and minicomputers. The protocol was designed to allow dynamic routing and reduced latency compared to earlier Serial Data Link Control implementations. Although it was eventually superseded by TCP/IP in the commercial sector, the protocol was widely adopted in a handful of specialized scientific and defense applications.

In the early 2000s, the name reappeared in the context of network virtualization when XNet Software launched a suite of tools for creating isolated virtual network topologies on commodity hardware. This product, delivered as a free‑and‑source package, enabled researchers to model complex network scenarios, including Quality of Service (QoS) parameters and traffic shaping, without the need for dedicated infrastructure. The platform gained traction in academic settings and companies providing software‑defined networking (SDN) education.

A third, more recent incarnation of XNet is a community‑driven open‑source project that focuses on emulating legacy network protocols for modern operating systems. The project provides a kernel‑level bridge that translates traffic between traditional network stacks and contemporary frameworks, allowing legacy applications to run on cloud‑based virtual machines without modification.

Across all of its incarnations, XNet has played a role in advancing network research, supporting specialized industrial applications, and preserving compatibility across evolving computing environments. The term is frequently cited in technical literature on packet routing, virtualization, and legacy system emulation, and continues to be a reference point for discussions about network protocol evolution.