The book "Modeling of functioning of elements of telecommunication networks and development of the method of calculation of reliability indicators" by Sherstnev O. G. Co-authored with Wolf A. A. , Chelyshkov P. D. , Sedov A. In. and Lysenko D . A. represents an important contribution to the field of telecommunications and system analysis. This publication will be of particular interest to specialists, students and graduate students involved in the design, operation and optimization of telecommunications systems. The book examines key aspects of modeling the functioning of telecommunication network elements, which allows the reader to understand more deeply how modern communication systems work. The authors offer readers a unique method of calculating reliability indicators, which will help not only in theoretical research, but also in practical application. This is especially true in the context of the rapid development of technologies and increasing requirements for the quality of communication. The book covers a wide range of topics, including the basics of telecommunications systems, the principles of their functioning, as well as methods of analysis and optimization. Readers will be able to familiarize themselves with various models that help visualize and evaluate the operation of networks, as well as with calculation methods that allow determining the reliability and effectiveness of telecommunication solutions. This makes the book a valuable resource for those who seek to improve their knowledge of network technologies and improve their skills. For students and young professionals interested in telecommunications, this book will be a handbook that will help you master complex concepts and put them into practice. It will also be useful to experienced professionals who want to update their knowledge and become familiar with new methods and approaches in the field of network modeling and analysis. The style of the authors is distinguished by the clarity and accessibility of the presentation, which makes complex technical aspects understandable even for those who are just starting their way in this area. The authors use examples from real practice, which allows readers to better digest the material and see how theoretical knowledge is applied in real conditions. The book "Modeling the functioning of elements of telecommunication networks and the development of a method for calculating reliability indicators" is not only informative, but also relevant in the light of current trends in the field of communication. In an environment where the reliability and efficiency of telecommunication systems play a key role in business and everyday life, knowledge of analysis and modeling methods becomes necessary for successful work in this field. If you are looking for literature that will help you understand the complex issues of telecommunications networks, pay attention to other works of authors who are also engaged in research in the field of information technology and communication systems. Books such as Fundamentals of Telecommunication Systems Theory or Network Solutions Analysis and Design can complement your knowledge and deepen your understanding of the subject. Thus, “Modeling the functioning of telecommunication network elements and developing a method for calculating reliability indicators” is not just a book, but a whole world of knowledge that will open before you if you decide to immerse yourself in its pages. This publication will become a reliable assistant for everyone who seeks professional growth in the field of telecommunications and wants to be aware of modern technologies and methods of analysis.