This book explores the infrastructure of MES Center enterprises, including information technology systems, departmental communication networks, digital hierarchies of communication networks, the primary digital network, infocommunication networks, and their technological ecosystems. It offers a synthesis of theory and practice to address current challenges in designing, operating, managing, and modernizing dedicated communication networks within the Unified Technology Communication Network of the MES Center. Ideal for engineers and specialists working with departmental and corporate communication networks in the energy sector, the book will also benefit equipment manufacturers, university students, and technical college students studying in the field of Electrical Power Engineering and Electrical Technologies (specialization 140400).