This document contains a tutorial on the recent work in the area of offering services in the Internet. We cover the principles and some of the details of Integrated Services and Differentiated Services. We also explain the relationship to RSVP of each of these architectures. Finally, we draw some conclusions about the relationship of these architectures to SURFnet.

quality of service (qos) refers to a set of rules or techniques that help the network administrators use the available network resources optimally to manage the effects of congestion and to treat the applications according to their needs. the differentiated services architecture (diffserv) allows providing quality of service to users. the major diffserv premise is that individual flows with sim...

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This work investigates the benefits and drawbacks of using a lottery to schedule and drop packets within a router. We find that a lottery can provide many distinct levels of service without requiring that per-flow state be maintained in the routers. We also investigate the re-ordering within a flow that can occur if a lottery is used to pick packets to forward without regard to their flow order.

Dieser Beitrag soll zeigen, dass sich das heute vorhandene IP-QoS-Instrumentarium nicht nur zur Erfüllung der Anforderungen von Audiooder Videoanwendungen eignet, sondern sich auch gezielt für ganz andere Management-Aufgaben einsetzen lässt. Mit einem intelligenten Bandbreitenmanagement wird ein wirtschaftlicher und fairer Umgang mit Netzressourcen erreicht. Dazu werden die verfügbaren Bandbrei...

In a QoS-Enabled network environment, there are two major concerns from both user’s and provider’s points of views: are there enough resources available for a particular traffic flow and what’s the price for this flow? These two questions are exactly what admission control and pricing try to answer. An architecture that integrates pricing and admission control seems very promising. In this pape...