(This book comprehensively and systematically introduces the principles, techniques and methods of LAN scheme, design, construction, management, protection and evaluation. It discusses in detail the function analysis and scheme design of the establishment of LAN; the establishment of Windows2000Server and Linux network methods, Web server, FTP and MAIL server, LAN management and protection, LAN interconnection solutions, and LAN project management and evaluation and other issues. And contact the author for many years engaged in the practice of system integration, to provide readers with several solutions for local area network formation, management and protection. This book has the characteristics of teaching materials and technical materials, suitable for self-study teaching materials for system integration training. It is also a technical reference material and a necessary reference book for network engineering technicians and managers.)