What is the difference between ns-2 and ns-3?
ns-2 is a popular discrete-event network simulator developed under several previous research grants and activities. It remains in active use and will continue to be maintained. ns-3 is a new software development effort focused on improving upon the core architecture, software integration, models, and educational components of ns-2. The project commenced in July 2006 and the first release was made on June 30, 2008.
