Queues and stochastic networks are analyzed in this book with purely
probabilistic methods. The purpose of these lectures is to show that
general results from Markov processes, martingales or ergodic theory can
be used directly to study the corresponding stochastic processes. Recent
developments have shown that, instead of having ad-hoc methods, a better
understanding of fundamental results on stochastic processes is crucial
to study the complex behavior of stochastic networks.