This paper describes the Network Modeler application that helps differentiated services network design, planning and configuration testing. This application allows a user to draw a network, configure it, and evaluate its performance through simulation. A simple scenario is presented, showing the potentialities of the Network Modeler, the advantages of using differentiated services, and proving ...

One of the key problems to be solved in Mesurement-Based Admission Control is to efficiently utilise the information provided by the sources and measured by the network. There is a direct relationship between the amount of information available and the resulting effectiveness of the admission algorithm. In this paper we analyse the tradeoff between complexity and effectiveness using a practial ...

The IETF has developed several specifications for policy-based configuration management. In addition, an infrastructure for distributed management by delegation has been specified. This paper combines key concepts developed in these two efforts and proposes a policy-based configuration management architecture built upon the distributed management infrastructure. Two prototype implementations fo...

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Keeping in mind the present network management research trends, it can be safely stated that in the near future enterprise networks and ISPs will need a network management entity to dynamically manage QoS networks. DiffServ is one of the emerging networks that introduces bandwidth broker as its logical resource, network and policy management module. Due to the complex and huge functionality pro...

The paper first briefly reviews the extent to which profit maximising transport firms with identical cost functions and producing identical transport services pass-on output taxes to transport users under perfect competition, under different forms of imperfect competition and when they act as monopolists. Then the analysis is extended to derive the pass-on rates and activity reductions caused b...