Network Simulator ns-3 is a discrete-event network simulator for Internet systems, targeted primarily for research and educational use. ns-3 is free, open-source software, licensed under the GNU GPLv2 license, and maintained by a worldwide community. Recent News (Older) May 29, 2024 ns-3.42 released The ns-3.42 release has been published. This release provides a new Non-Terrestrial Networks (NTN)