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To: Frank A. Coluccio who wrote (22308)	6/30/2007 1:13:38 AM
From: axial	Read Replies (2) of 42726

From the Department of Stunning Revelations... Undifferentiated Networks Would Require Significant Extra Capacity "A new study by researchers at Rensselaer Polytechnic Institute, AT&T Labs, and the University of Nevada, Reno suggests that an Internet where all traffic is treated identically would require significantly more capacity than one in which differentiated services are offered... ... The additional capacity needed for an undifferentiated network compared to a differentiated network is referred to as the Required Extra Capacity. The study estimates that the Required Extra Capacity in even modestly loaded networks could approach 60 percent. At times of heavy demand on the network, the Required Extra Capacity in an undifferentiated network could amount to an additional 100 percent or more of the total capacity required when differentiation is permitted... ... “Clearly, an undifferentiated network in this context is less efficient and more expensive,” said coauthor K.K. Ramakrishnan of AT&T Labs. “We believe understanding the real impacts of the alternative strategies is important as the debate about network architecture unfolds.” The paper, “Value of Supporting Class-of-Service in IP Backbones,” is available online at ecse.rpi.edu . Other researchers involved with the study were Murat Yuksel of the University of Nevada, Reno, and Joseph D. Houle and Rita Sadhvani of AT&T Labs. The study was funded by AT&T." physorg.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Not to be confused with Isenberg's arguments for Big Fat Pipes, or anything like it... Jim

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