Internet of Things (IoT): Architecture, Applications, and Security Challenges

The Internet, a revolutionary invention that is constantly evolving, is always transforming into a new type of software and very small hardware which makes it inevitable in our daily use. The forms of communication are known as either human-human or human-machine, this paper presents an overview of the Internet of Things (IoT). It consists of four sections. The first section will describe the five-layer IoT architecture. The second section will address IoT applications. the Third section will indicate the security challenges in the relevant major IoT architecture layers. The last one will provide some solutions existing in the literature to deal with IoT security problems.