Tetcos develops Software Tool for Studying Computer Networks. Tetcos also develops various software and hardware products in the communication and networking domain for academics, technical training and research segments. The Software Tool for Studying Computer Networks, also known as NetSim, features state of the art network simulation technology and comes with additional offerings that enhance and quicken students` learning, and prepare them better for their career. This Software Tool is designed to work on the local system and is installed on each computer.