Buffer sizing, majorization, QoS routing, finite buffer queue vs. infinite buffer queue and performance; Control theoretic framework for modeling of TCP and AQM schemes; Discrete mathematics to model buffer occupancy at queues of a network (given workloads); Game theoretic modeling of AQMs (mathematics to model selfish traffic); Fairness models (proportional fairness, max-min fairness, low state global fairness); Optimization framework for congestion control, fairness and utility maximization; Modeling and simulation of large network scenarios using queuing theory