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ASALAM O ALIKUM Muhammad Younas.
Future network is the Plate-forum that all other networks and device (software/hardware based ) are connect each other simply and follows the rules Y3001.
like CISCO they have their own setup and rules. for communication we use NGN terminology... now they are switched to Future networks... that they can communicate all other networks easily....
OR you can study that
http://www.ofcconference.org/getattachment/68378ba8-f0a1-4b02-adae-65ee28993ee2/SDN-and-the-Future-of-Service-Provider.aspx