The book "Commutation Systems: Methodical Instructions and Control Work for Students of the Specialty I-45 01 03 "Telecommunication Networks"" by C. M. Lapshina is an indispensable educational material for students seeking a deeper understanding of the basics of telecommunication systems and their functioning. In today's world, where technology is developing at an incredible speed, knowledge of the principles of operation of networks and switching systems becomes not only useful, but vital for future communication specialists. In this edition, the author offers readers a detailed analysis of key aspects of switching systems, including their architecture, operating principles and current trends. Lapshin uses an accessible and understandable language, which makes the material easy to understand even for those who are just starting their way in the world of telecommunications. The book presents not only theoretical foundations, but also practical tasks that will help students consolidate their knowledge and prepare for real challenges in the profession. The book will be especially interesting for students and teachers working in the field of networks and telecommunications, as well as for anyone who wants to expand their knowledge in this dynamic and rapidly developing field. It is suitable for both beginners and more experienced professionals who want to refresh their knowledge or prepare for exams . The topics discussed in the book are relevant for students of technical universities, colleges and anyone interested in modern communication technologies. One of the key topics raised in the book is the analysis of different types of switching systems and their application in real-world conditions. Lapshin emphasizes the importance of choosing the right system for specific tasks, which is an important aspect of the work of any specialist in the field of telecommunications. He also discusses the impact of new technologies, such as 5G and IoT, on the development of switching systems, which makes the book relevant in the context of modern trends. The author's style is clear and logical, which allows the reader to easily follow the presentation of the material. Lapshin not only shares his knowledge, but also inspires students to further explore the topic, encouraging them to ask questions and seek answers. His experience and professionalism make this book a valuable resource for both the learning process and self-study. In addition, “Commutation Systems” may be of interest to those working in related fields, such as information technology, computer networks, and programming. The book can serve as a basis for further study of more complex topics, such as the design of network solutions or the development of software for telecommunications systems. If you are looking for a high-quality teaching aid that will help you understand switching systems and prepare for exams, “Commutation systems: guidelines and test work for students of the specialty I-45 01 03 “Telecom networks” will be an excellent choice. This book will not only enrich your knowledge, but also inspire new achievements in the world of telecommunications. Do not miss the opportunity to become an expert in this important and sought-after field!