Internet of the future known as the "Internet of Things" (IOT) is a global web of things that are uniquely addressable based on standard protocols. In the recent past years we have seen many technological evolution like the transition from the analog world into its digital world and from centralized wired to distributed and then into pervasive wireless systems. In our everyday lives wireless sensor networks are increasing tremendously. Applications such as control networks, enhanced-living

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... rios, health-care, industrial and production monitoring and in many other sectors are growing widely. Wireless sensor network likely to be integrated into "Internet of Things" and the sensors nodes connects internet dynamically in order to cooperate and achieve their tasks. In this paper, we appraise various methods to combine WSNs into the Internet and shape a set of challenges in the upcoming future.