Modern communication technologies such as 5G and 6G and the Industrial Internet of Things (IIoT) have important attributes to meet the requirements of industries, and with the rapid development of the fourth industrial revolution and beyond, it is unavoidable that these will fulfill the necessary requirements of this important part of modernization. Industrial Applications of the Internet of Things and 5G and 6G Networks ranges from the application of recently ratified communication standards, theoretical knowledge that provides tangible insight for understanding the principles of operation, design, implementation, and planning, to the outcomes from deployment of industrial projects. Covering topics such as 5G network programmability, industry policies, and optical networking technologies, this premier reference source is a valuable resource for computer scientists, IT specialists, industry consultants and professionals, business leaders, libraries, students, researchers, and academicians. With the arrival of 5G, we have entered a new era of connectivity, and it is expected that the upcoming 6G network will bring more and more opportunities and challenges to the industrial Internet of Things. The continuous digital transformation led by Industry 4.0 has driven the demand for more advanced Internet of Things systems that can handle massive data, high traffic, and diverse applications while ensuring low latency, high reliability, and security.