Abstract: The key trend driving the growth of Internet over the last decade is the profusion of services over the Internet. Google, Facebook, YouTube and similar services form the bulk of the Internet traffic. Cloud computing and proliferation of mobile devices has lead to further growth in services over the Internet. The current Internet architecture designed for point-to-point communication is not suitable for service delivery since most services are distributed (world-wide) and have multiple points of attachment. Many application service providers, therefore, bypass the Internet either by implementing their own WANs (e.g., Google WAN) or by leasing services from other private WANs (e.g., Akamai).
An open and secure service delivery network (SDN) will allow telecommunication carriers to offer SDN services that can be used by many application service providers (ASPs). For example, an ASP wanting to use multiple cloud computing centers could use it to setup their own world-wide application specific SDN and customize it. Clouds make computing a service. Open SDN introduces the concept of networking as a service and will allow setting up new services using these clouds as easily as the clouds themselves.
Networking research funding agencies in USA, Europe, Japan, and other countries are encouraging research on revolutionary architectures that may or may not be bound by the restrictions of the current TCP/IP based Internet. Our proposed openSDN architecture is evolutionary in the sense that it is able to coexist and is backward compatible with the current Internet.
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