This book has a comprehensive and systematic introduction to the theories and technologies which network system involves, the schemes and steps of network system design and the basic knowledge, architecture, communication protocols, network equipment, transmission media and other technologies and products that network systems engineering project requires. It also has a detailed introduction to the requirement analysis and design of network system, overall wiring and network design, LAN set-up, security solutions and project management. Finally, through several examples, it explains network system analysis and design. The book, to the maximum degree, integrates the knowledge of new technologies and new products.