The document discusses network simulation tools and provides guidance on their use. It lists CloudSim and FogSim as simulation tools. It then provides details on supporting NS2 simulator code, the major NS-NAM interface, and significant parts of NS2 like Nam, preprocessing, postprocessing, and Xgraph. The next section outlines utmost network simulator features such as wireless domains of satellite networking and sensor networks. It also mentions emulators to connect simulators to real networks. Areas of wired domains include LAN, multicast, and full TCP applications. The final section provides contact information for the network simulation tools website.