In this training course on Design and Configuration of Telecommunications Networks, we will explore the essential fundamentals and common threats facing modern networks. It begins by explaining the basic principles and common threats facing networks, equipping students with the skills needed to protect y manage network environments effectively. The course examines attacks that could compromise the integrity and security of a network, providing students with an insight into existing vulnerabilities. Then, in the OSI models y TCP/IP, provides a conceptual framework for understanding how today’s networks are structured and operate. It also explores the Wi-Fi protocols.