Abstract—The Internet of Things as global information architecture emerges on the Internet by facilitating the exchange of services is gradually developing. At that time, the technology of Internet of Things is still under discussion. Internet-of-Things envisions a future in which digital and physical entities can be linked, through information technology and appropriate communication. In this paper, we present a study of technologies, applications and research challenges for the Internet of Things. Keywords— Web, Internet of Things, web service research, security. I. INTRODUCTION HE combination of technologies and Internet, such as near-field communications, location in real time and embedded sensors allows us to transform everyday objects into intelligent objects that can understand and respond to their environment. These objects are building blocks for Internet of Things. This last is a concept in which the virtual world of information technology integrates seamlessly with the real world of objects. The rest of the paper is organized as follows. In Section 2, we introduce the different definition of Internet of Things. The main Internet of Things technologies are the subject of Section 3, while the descriptions of the main applications are addressed in Section 4. Section 5 gives a look at the outstanding issues on which research should focus, emphasizing on topics such as authentication, security, and privacy. Conclusion is given in Section 6. II. DEFINITION Haller / Karnouskos / Schroth define the Internet of Things as "a world in which physical objects are perfectly integrated into information network, and where physical objects can become active participants in the business process. Services are available to interact with these smart objects on the Internet, query their state and any information associated with them, taking security and privacy issues into account. "[1] [4] The CERP-IoT "Cluster European research projects on the Internet of things” defines the Internet of things like: " a dynamic infrastructure of a global network. This global network has ability of auto-configuration based on standards and communication protocols interoperable. In this network, 1 LINFI, Mohamed KhaiderUniversity , Biskra, Algeria 2 LIRIS, National Institute of Applied Science of Lyon, Lyon, France. physical and virtual objects have identities, physical attributes, virtual personalities and intelligent interfaces, and they are integrated into the network in a transparent manner "[3] [9] III. THE REQUIRED TECHNOLOGIES The update of IoT concept in the real world is possible through the integration of several enabling technologies. In this section, we discuss the most relevant. Note that it is not our goal to provide a comprehensive study of each technology. Our main objective is to provide a picture of the role they likely play in the IoT. [6]. 3.1 Identification and Technologies of Detection and Communication  Radio Frequency Identification RFID: RFID is a generic term for technologies that use radio waves to automatically identify people or objects. [1] [2]. There are several methods of identification, the most common is to associate the unique identifier of the RFID label with an object or a person. An RFID system typically includes the following elements: o An RFID device (label); o a reader of label with an antenna and transmitter-receiver; o a host system or the connection to an enterprise system [ 2]  Near Field Communication (NFC): is a technology that allows a device to communicate with another at a maximum distance of approximately 20 cm or less [7]. Near Field Communication (NFC) is a specification for communication between two devices without contact. NFC is based on the technology used for RFID. NFC is intended to make it easier and more practical to make transactions, exchange of digital content, and connect electronic devices with a key [ 10]  Sensor Network: a network of sensors is composed of a large number of sensor nodes, which are deployed at high density on the inside of the phenomenon to monitor or very near to him. Take advantage of the idea of sensors networks based on collaborative effort of a large number of nodes. The sensor networks represent a significant improvement over traditional sensors, which are deployed in the two following ways: o Sensors can be placed far from the genuine phenomenon, that is, a thing known by the sensory perception. In this approach, large sensors that use some complex techniques to distinguish the targets of noise in the environment are needed. Internet of Things New Challenges in Distributed Artificial Intelligence Maroua Ahmid 1 , Okba Kazar 1 , Souraya Hamida 1 , Laid Kahloul 1 and Parisa Ghoudous 2 T International Journal of Computer Science and Electronics Engineering (IJCSEE) Volume 3, Issue 5 (2015) ISSN 2320–4028 (Online) 375