By presenting the building blocks of the IoT network architecture, this MOOC will help learners adapt to the fast changing communications and networking environment of IoT. The IoT world represents billions of sophisticated objects, such as sensors, actuators and meters, that are deployed nearly everywhere, in homes, hospitals, factories, cities, and are connected to the Internet. However, they come with limited capacity in terms of memory storage, computational power and energy; how can these objects then ensure network reliability and timely transmission? That is what you will learn in this course: how we can set up wireless communications and networking in the IoT to achieve these goals. This course has received financial support from the Patrick & Lina Drahi Foundation.