NS2 (Network Simulator 2)

Network Simulator 2 (NS2) is a software tool used to simulate and analyze how networks behave. It helps researchers and engineers design and test networking protocols by creating virtual environments where they can observe how data travels between devices, such as computers or routers. By modeling different scenarios, NS2 allows users to evaluate the performance, efficiency, and reliability of network systems without needing to set up physical hardware. This makes it an invaluable resource for developing improved technologies in communication and networking.