The Design of Infocommunication Networks . Course design: educational and methodological manual" by Alexander Sergeevich Zelenin is an indispensable resource for students, graduate students and specialists in the field of information technology and telecommunications . With the rapid development of technology and an increase in the amount of information transmitted through the network, the need for high-quality design of information and communication systems is becoming increasingly urgent. This manual offers readers not only theoretical knowledge, but also practical skills that will help in the implementation of course projects and research. The book covers a wide range of topics related to the design of infocommunication networks. The author examines in detail the basic principles of design, network architecture, the choice of equipment and software, as well as methods of analyzing and optimizing the operation of networks. Each section contains practical examples and tasks, which allows readers not only to learn the theory, but also to apply it in practice. This makes the manual particularly valuable for students who are preparing to defend coursework or diplomas. Who is this tutorial intended for? First of all, it will be useful for students of technical universities studying disciplines related to information technology and telecommunications . And not just for them. Specialists working in the field of network design and operation will also find in the book a lot of useful information that will help them to update their knowledge and master new approaches. In addition, the manual will be of interest to teachers who are looking for high-quality materials for the preparation of coursework and laboratory work. The topics raised in the book cover both the basic aspects of network design and more complex issues such as network infrastructure security and sustainability. As cyber threats become more sophisticated, understanding the principles of information security and network security becomes critical. Zelenin focuses on how to properly design networks with these threats in mind, making his manual particularly relevant to the modern reader. The author's style is distinguished by clarity and accessibility of presentation, which allows even beginners in the field of information technology to easily absorb material. Zelenin uses many illustrations, diagrams and tables, which makes the learning process more visual and fascinating. His approach to learning is based on the principles of practical orientation, which allows readers not only to memorize theoretical knowledge, but also to apply them in real life. In addition to “Designing Infocommunication Networks”, Alexander Zelenin is the author of other well-known works devoted to information technologies and telecommunications. His work is popular among students and professionals, which confirms the high level of his expertise in this field. If you are looking for a high-quality tutorial that will help you understand the intricacies of designing infocommunication networks, then the book “Design of infocommunication networks . Course design: training manual” will be an excellent choice for you. It will not only expand your knowledge, but also inspire further research and projects in the field of information technology. Do not miss the opportunity to immerse yourself in the world of modern network technologies and become an expert in the design of infocommunication systems!