IP and ATM failed to deliver ? well i don't say this but got this from the web site of a competitor of cisco!! But that is besides the point. Below I have reproduced the text verbatim. what it says that both IP and ATM failed as carriers to carry puredata due to different reasons as explained below. IP due to the packet forwarding features in traditional routers (i guess cisco), and ATM because it itself could not scale to the levels required for pure data. well would some one explain this what and how exactly ? specially how ATM fails to scale for data traffic ? "Although both ATM and IP held the promise of building converged networks in principle, neither actually delivered in practice. ATM networks were unsuccessful because they could not scale to the levels required for pure data applications. Traditional IP networks failed because they used legacy routers that implemented forwarding and features in software. These routers were not able to achieve anywhere near the performance needed for delivering services at speed. So providers had to choose between providing simple connectivity with no services or providing poor performance with services enabled."
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