Abstract
This paper describes the benefit of using modeling and simulation tools to aid educational process in teaching computer network engineers. These techniques motivate students and encourage them to be original and creative. The obtained results are promising to reduce the gap between the education in universities and real work environments. This in turn makes students prepared to face real-world problem during their future real jobs. Packet tracer, GNS2, OPNET, and fat-tree simulator tools are used in this paper.