The Internet of Things (IoT) is a network connecting devices via the Internet. Anyone can easily trace the visual start from a user (a person or some kind of robotics) and the final step with some information finding itself in a cloud-based platform or some data centres.
However, the process inside is much more complicated. The entire system of a typical IoT device (a wearable, CCTV, industrial manufacturing, etc.) is basically the same. It includes firmware, protective services, sensors, processors, network connectivity, power and related elements, memory, and storage.
Also, there are many specialists - hardware and software developers, various IT experts, including cyber security professionals, etc. - behind IoT devices who are supposed to work together to guarantee the high performance of the entire system.