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Although IP traffic has been growing exponentially for years and it is expected to keep following the same rate in the near future, current business models do not allow operators to benefit from traffic growth and they fail in motivating investments in next generation networks. In the absence of sufficient investments, operators are induced to avoid congestion by means of traffic management strategies which raise neutrality issues. In spite of the heated debate on net neutrality, all the players involved in the Internet value chain agree in saying that new models are required to overcome broadband stagnation and support innovation. Neutral Access Networks (NANs) have been recently proposed as means for enabling the development of the Internet without threatening network neutrality.
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