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Internet of Things (IoT) and Network Softwarization are fast becoming coretechnologies of information systems and network management for next generationInternet. The deployment and applications of IoT ranges from smart cities tourban computing, and from ubiquitous healthcare to tactile Internet. For thisreason the physical infrastructure of heterogeneous network systems has becomemore complicated, and thus requires efficient and dynamic solutions formanagement, configuration, and flow scheduling. Network softwarization in theform of Software Defined Networks (SDN) and Network Function Virtualization(NFV) has been extensively researched for IoT in recent past. In this articlewe present a systematic and comprehensive review of virtualization techniquesexplicitly designed for IoT networks. We have classified the literature intosoftware defined networks designed for IoT, function virtualization for IoTnetworks, and software defined IoT networks. These categories are furtherdivided into works which present architectural, security, and managementsolutions. In addition, the paper highlights a number of short term and longterm research challenges and open issues related to adoption of softwaredefined Internet of things.

IoT Virtualization: A Survey of Software Definition & Function Virtualization Techniques for Internet of Things