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Network Simulator 3 (NS3)
Field: Computer networking
Type: Network Simulation
Status: stable
Programming language: c++,python
Last release: 3.4 (2009/04/01)
Category:License: GNU GPLv2 license
Affiliation: The French National Institute for Research in Computer Science and Control
Maintainer: Mathieu Lacage

ns-3 is a discrete-event network simulator for Internet systems, targeted primarily for research and educational use. ns-3 is free software, licensed under the GNU GPLv2 license, and is publicly available for research, development, and use.

ns-3 is intended as an eventual replacement for the popular ns-2 simulator. The project acronym “nsnam” derives historically from the concatenation of ns (network simulator) and nam (network animator).