Stateless Core
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Stateless Core: A Scalable Approach for Quality of Service in the Internet
The fundamental aspect of the Internet architecture that distinguishes it from other network technologies (such as X. 25 and ATM) is that it is c- nectionless (vs. connection-oriented) and stateless (vs. stateful). The heated debateofwhetherconnection-orientedorconnectionlessarchitectureisbetter has lasted for several decades. Proponents of the connectionless architecture point out the great robustness and scalability properties of the architecture, as demonstratedby the Internet. Onewell-knownarticulationofthis philo- phy is the "End-to-End Arguments". Opponents argue, rightfully, that there is no known solution that can provide quantitative performance assurances or guaranteed QoS in a connectionless network. It has been widely rec- nized that QoS is a must-have feature as the Internet technology evolves to the next stage. However, all existing solutions that provide guaranteed QoS require routers to maintain per?ow (another name for connection used by the Internet community) state, which is the fundamental element of a connection-oriented architecture. The apparent con?icting goals of having a stateless network and supporting QoS have presented a great dilemma for Internet architects. As an example, Dave Clark, one of the most respected Internet architects and the author of the famous "End-to-End Arguments" paper, wasalsoakeydesigneroftheInternetIntegratedServicesArchitecture that requires routers to maintain per?ow state. Dr. Ion Stoica's dissertation addresses this most pressing and di?cult problem facing the Internet community today: how to enhance the Internet to support rich functionalities (such as QoS and tra?c management) while still maintaining the scalability and robustness properties embodied in the original Internet architecture. Inhisdissertation, Dr
Protocols for High Speed Networks
This workshop on “Protocols for High-Speed Networks” is the seventh in a s- cessful series of international workshops, well known for their small and focused target audience, that provide a sound basis for intensive discussions of hi- qualityand timelyresearch work. The location of the workshop has alternated between Europe and the United States, at venues not onlyworth visiting for the workshop, but also for the distinct impressions theyleave on the participants. The ?rst workshop was held in 1989 in Zurich. Subsequentlythe workshop was moved to Palo Alto (1990), Stockholm (1993), Vancouver (1994), Sophia-Antipolis/Nice (1996), and Salem (1999). In 2002, the workshop was hosted in Berlin, the capital of Germany. PfHSN is a workshop providing an international forum that focuses on issues related to high-speed networking, such as protocols, implementation techniques, router design, network processors and the like. Although the topics have shifted during the last couple of years, for example, from parallel protocol implemen- tions to network processors, it could be observed that high speed remains a very important issue with respect to future networking. Traditionally, PfHSN is a r- ativelyfocused and small workshop with an audience of about 60 participants.
Understanding Statelessness
Understanding Statelessness offers a comprehensive, in-depth examination of statelessness. The volume presents the theoretical, legal and political concept of statelessness through the work of leading critical thinkers in this area. They offer a critique of the existing framework through detailed and theoretically-based scrutiny of challenging contexts of statelessness in the real world and suggest ways forward. The volume is divided into three parts. The first, ‘Defining Statelessness’, features chapters exploring conceptual issues in the definition of statelessness. The second, ‘Living Statelessness’, uses case studies of statelessness contexts from States across global regions to explore the diversity of contemporary lived realities of statelessness and to interrogate standard theoretical presentations. ‘Theorising Statelessness’, the final part, approaches the theorisation of statelessness from a variety of theoretical perspectives, building upon the earlier sections. All the chapters come together to suggest a rethinking of how we approach statelessness. They raise questions and seek answers with a view to contributing to the development of a theoretical approach which can support more just policy development. Throughout the volume, readers are encouraged to connect theoretical concepts, real-world accounts and challenging analyses. The result is a rich and cohesive volume which acts as both a state-of-the-art statement on statelessness research and a call to action for future work in the field. It will be of great interest to graduates and scholars of political theory, human rights, law and international development, as well as those looking for new approaches to thinking about statelessness.