Network simulation is an important methodology in network research fields and OPNET Modeler is a very useful tool for network modeling and simulation. OPNET Modeler is generally used by researchers, protocol designers, university teachers and students in the fields of electronic engineering, computer science, management information systems, and related disciplines. The friendly design of its graphical user interface (GUI) makes it nice and easy to start with. However, the complexity of OPNET Modeler and lack of useful support material make it difficult for many users to fully make use of its benefits. OPNET Modeler has its documentation covering many aspects on using the modeler. However, it covers too many aspects in parallel form rather than a step-forward form, making users unable to decide where to start and causing them to lose focus.

This book is an effort to partially fill this gap and should be useful for courses on network simulation and OPNET modeling for university students, as well as for the researchers on this topic. The book covers a wide range of knowledge from basic topics to advanced topics. All case studies in the book are step-by-step and progressive. Relevant files and sources can be downloaded from the publisher's website. A set of high-level wrapper APIs are provided to help even new users to write complex models, and experienced users to write large, complex models efficiently.