(According to the practical process of network construction, this book introduces the network composition and planning, wiring planning and construction, equipment selection and equipment, remote management and monitoring, network security and implementation, fault diagnosis and elimination of small and medium-sized networks in an orderly, comprehensive and specific manner. , involving all network hardware skills from planning, building equipment to troubleshooting, is a complete set of practical solutions. In addition, it has conducted in-depth and detailed analysis of a large number of examples, further cultivated readers' ability to analyze and solve problems, and are very accustomed to the practical needs of network administrators. This book is suitable for small and medium network administrators, as well as all network enthusiasts who are ready to engage in network management)