A simulation study of Web traffic over DiffServ networks

We present a simulation study of HTTP traffic crossing a DiffServ domain. We consider both the cases where the reserved bandwidth is not exceeded by the offered traffic (overprovisioning) and where the assured traffic competes with the classic best effort class (underprovisioning). The reported simulation shows that the DiffServ approach is able to protect the assured flows in the first case, while the performance benefits are tighter in the second case, in which fairness issues arise between long and short-lived flows.