NS-2 (Network Simulator 2)

NS-2, or Network Simulator 2, is a software tool used by researchers and engineers to create virtual models of computer networks. It enables simulation of network protocols, devices, and communication processes, allowing users to test and analyze how data moves, how networks respond under different conditions, and identify potential issues without real-world deployment. By providing a flexible and detailed environment, NS-2 helps improve network design, optimize performance, and troubleshoot problems efficiently before implementing solutions in actual networks.