QualNet

QualNet is a commercial discrete-event network simulator designed to model large, complex communication networks. It was developed by Scalable Network Technologies (SNT) and is used by researchers, system designers, and organizations to analyze behavior under realistic traffic, mobility, and failure conditions.

The software provides a modular modeling framework that covers wired and wireless networking, including mobile ad hoc networks, sensor networks, and cellular systems. It includes an extensive library of protocols, traffic generators, and mobility models, enabling users to simulate routing, MAC, transport, and application layers across diverse technologies such as Wi‑Fi, cellular, and satellite links.

QualNet operates as a discrete-event simulator. Scenarios are defined through a combination of graphical scenario creation and scripted descriptions, and the simulator produces trace files and statistics for post‑simulation analysis. The tool supports large-scale deployments and aims to balance accuracy with simulation speed.

Typical applications include network design optimization, performance evaluation of new protocols and architectures, security and resilience testing, and academic research. It is often used to evaluate network behavior under heavy traffic, mobility, interference, and failure scenarios before deployment.

As a proprietary product, QualNet complements open‑source simulators such as ns-3 and OMNeT++ and is positioned for users needing scalable, enterprise-grade modeling and integration with broader design workflows.