A direct interpretation of the term Internet of Things refers to the use of standard Internet protocols for the human-to-thing or thing-to-thing communication in embedded networks. The main aim of IoT is to create a virtual footprint of all the devices and people connected to it. It provides a new method of communication between all the things and the people, and also between the objects itself. IoT provides a different level of communication. This paper explains all the concepts of IoT and the mechanism in brief. The important technologies which enable IoT are RFID systems, Sensor networks and intelligence technologies. The potential applications of these technologies are reviewed and the major research issues are described. © Research India Publications.