Communications networks have emerged as a multidisciplinary diversified area of research over the past several decades. From traditional wired telephony to 6G and 7G cellular wireless networking industry and from wired local area networks and IEEE 802.3 Ethernet to wireless access to the Internet with IEEE 802.11 Wi-Fi, and IEEE 802.15 Bluetooth, ZigBee and ultra-wideband (UWB) technologies profoundly impacting our lifestyle. At the time of this writing, the wireless infrastructure of over a

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... lion Wi-Fi access points and several hundred thousand cellular wireless base stations enable, several billions of smartphones, billions of desktops, and laptops as well as hundreds of billions of Internet of Things (IoT) devices to connect to the Internet from anywhere, at any time. The popularity of smartphones enabling the fusion of computers, networking, and navigation for location aware multimedia mobile networking and emergence of machine learning industry has fueled the emergence of the smart world affecting communications, trades, health, transportation, financing, education, and all aspects of our lives. In response to this growth, universities and other educational institutions must educate and prepare the task force in understanding these technologies to keep up with this amazing growth of the industry. Communications networking is a multi-disciplinary field of study. To understand this industry and its technology, we need to learn several disciplines and develop an intuitive feeling of how these disciplines interact with one another. To achieve this goal, we describe important communications networking standards and applications, logically classify their underlying technologies, and give detailed examples of successful technologies with the fundamental science behind them. The selection of detailed technical material for teaching in such a large and multidisciplinary field is very challenging because the emphasis of the technology shifts in time and the skills of the instructors are limited to their research experiences in certain aspects of this gigantic industry. The author began his teaching of wireless networks by introducing the concept of wireless office information