From Networks to Smart Devices: Understanding IoT is a comprehensive and beginner-friendly guide designed to introduce readers to the fundamentals of computer networks and the rapidly evolving world of the Internet of Things (IoT). This book covers essential concepts starting from basic networking principles to advanced IoT technologies and real-world applications. It provides a structured learning approach through well-organized units, including topics such as network types, layered models, IoT architecture, sensors and actuators, cloud computing, and IoT case studies in areas like healthcare, agriculture, and smart systems. The content is presented in a clear and easy-to-understand manner, making it ideal for students, beginners, and technology enthusiasts. The book also includes practical examples, diagrams, and exercises to strengthen understanding and application of concepts. It serves as a valuable resource for academic learning as well as skill development in modern networking and smart device technologies.