(Introduction Routing, switching, and remote access technologies are not just the focus of Cisco's CCNP courses and exams. It is the three major support technology systems in the field of modern computer networks. They cover almost every aspect of a complete campus network implementation. Students often say that they cannot apply what they have learned. In fact, each chapter in the CCNP course corresponds to each small case in the actual project. However, the actual project is a synthesis of each small case. When encountering a practical project, you may wish to adopt a top-down, modular approach and refer to the 3-layer model to design and implement the project. This paper analyzes the design scheme of the campus network in the mode of an example, and gives the configuration steps, configuration commands, and diagnosis commands and methods of the key equipment of the campus network. Through this article, I believe that readers can systematically master the design, implementation and maintenance methods and skills of small and medium-sized campus networks.)
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