Web Techi Networking WG I Requires aggressive reliance on gor Scott Bradner, Harvard&IESG technologies and actiye engagem Dr Suleyman Guleyupoglu, NRL I so.Wac正 EE Jand Web3 Dr. Sue Numrich, DMSO Adaptive,cross-platform capabilities will be a Dr. Marcelo Zuffo, U. of Sao Paulo, Brazi Dr Steve Carson, GSC Associates NOTE: We had good agreemet on al ises, possibly Network Qos ts a s ed or neg Networking WG standard for. Working assumptions The simulation will hot be confined to individual capacity, latency, jitter, loss in.- vidual ISE a also in actve path se to defini Must be able to un over the public intemet needs of a we the benefits of XMSF to e.g. does the application need to enjoy the Scalability and resilience are es arly work project Network QoS continued M&s must characterize network requirement must define @cceptable terized fotm.en reliability nts are not met and latency in a param this implies they must be measured and global do Intermet-wide Qos negotiation take advantage lf changing network capacity ot to authentcation, d f service protec8 XMSF Strategic Opportunities Symposium 6 September 2002 43 Web Technologies / XML Requires aggressive reliance on commercial technologies and active engagement with their standards development groups such as IETF, ISO, W3C, IEEE, and Web3D. Adaptive, cross-platform capabilities will be a given XMSF Strategic Opportunities Symposium 6 September 2002 44 Networking WG Scott Bradner, Harvard & IESG Dr. Suleyman Guleyupoglu, NRL Dr. Sue Numrich, DMSO Dr. Norbert Schiffner, Fraunhofer CFCG Dr. Marcelo Zuffo, U. of Sao Paulo, Brazil Dr. Steve Carson, GSC Associates NOTE: We had good agreement on all issues, possibly because the technologies we considered are more mature. XMSF Strategic Opportunities Symposium 6 September 2002 45 Networking WG Working assumptions: n The simulation will not be confined to individual networks w either private networks individual ISPs n Application should not be media-aware n Must be able to run over the public Internet w without this, can’t achieve the benefits of XMSF to commercial industry n then defense can’t enjoy them either! n Scalability and resilience are essential in XMSF XMSF Strategic Opportunities Symposium 6 September 2002 46 Network QoS: meets a specified or negotiated standard for: n capacity, latency, jitter, loss in a statistical sense w can be done today in general terms within individual ISP networks w also Internet-wide by proactive path selection n a workable approach to defining consistency needs of applications * w e.g. does the application need to know order of sending w this requires translation from application requirements to network capabilities * early work project XMSF Strategic Opportunities Symposium 6 September 2002 47 Network QoS continued n must define acceptable tradeoff between reliability and latency in a parameterized form * n if a negotiated solution, mechanism(s) for negotiation needed w could be different for global and local negotiation w we don’t know how to do Internet-wide QoS negotiation XMSF Strategic Opportunities Symposium 6 September 2002 48 M&S must characterize network requirements n and the impact if the requirements are not met n this implies they must be measured and understood * n cannot assume any-to-any communication w firewalls and network address translation (NAT) get in the way n application or middleware should be able to adapt to take advantage of changing network capacity * w implies higher layer must be aware of available capacity n must define security requirements: w authentication, denial of service protection, confidentiality, auditing, integrity