This course is considered as a fundamental course for electrical, communications and computer and software engineers for a many years. Therefore, the course covers the fundamental topics in data transfer, transfer mediums, data networks, and data sharing in wireless/wired links, to learn through the principles of signals, signal transfer principles, transmission mediums, and data networking and discuss design patterns commonly used in modern data networks. At the end of the course, students will gain an understanding of the engineering tradeoffs and design principles used in data communications and signal sharing based in all types of mediums, such as wireless and wired. This course provides broad knowledge of data communications that includes hot topics of signal and transfer mediums in modern technologies.