(This book is written on the basis of the first edition, but all chapters in the first edition have been comprehensively revised, the sequence of some chapters has been adjusted, and some inappropriate or even wrong descriptions in the first edition have been corrected. At the same time, a large number of necessary contents and practical experience have been added to each chapter, making the content of the whole book richer, more systematic and practical. This book is still based on the idea of building a medium-sized analog LAN, and comprehensively introduces all aspects of knowledge and building and configuration methods related to LAN building. According to the contents and ideas introduced in each chapter of this book, readers can not only learn comprehensive LAN construction methods, but also learn good and rigorous corporate LAN construction habits, which makes the originally complex LAN construction project clear, methodical and based on. At the same time, it lays a foundation for the maintenance and management of LAN in the future.
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