Under the hood of the Internet: an overview of the TCP/IP protocol suite
Crossroads - Special issue on the Internet
Computer Networks and Systems: Queueing Theory and Performance Evaluation
Computer Networks and Systems: Queueing Theory and Performance Evaluation
Multivariable Feedback Design
Simulation with Arena
Introduction to Simulation and Risk Analysis
Introduction to Simulation and Risk Analysis
Introduction to Discrete Event Systems
Introduction to Discrete Event Systems
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Computer networks, especially Internet, are complex systems of enormous social impacts. Numerous implementation deficiencies or even failures have been implied by inadequate simulation and analytical modelling applied for performance investigations for such systems. The paper presents some specific work in this domain on the background of a survey of the methods applied currently. The problems of robustness investigation and optimisation is also mentioned. The work presented may be summarised by the slogan: "Think computers, think performance" that has made it possible to lead successively many pioneering Polish large-scale systems and networks without any troubles connected with inadequate system performance, though the available hardware was nearly always obsolete.