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Note Well
The Internet is (or is intended to be) a network without central intelligence –> a stupid network
The Internet is based on the end-to-end principle
Every user may reach any other user via the IP address
All “services” may be offered anywhere and may be accessed from everywhere
This is of course also valid for voice and other communication “services”
Voice and other communications do not need a “service” provider at all, they are applications.
Jon Peterson, ITU-IETF NGN Workshop, Geneva, May 2005
PPT Version