VoIP (Voice over IP (Internet Protocol)) denotes a set of applications that have specific requirements on quality of service (QoS): small loss rate, small delay and jitter. We investigate how different management strategies such as the queue management scheme, service differentiation (Diff-Serv) and the use of MPLS help getting the QoS necessary to VoIP applications. We use simulation on Network Simulator (NS) to compare these strategies on various scenarios.
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