Chapter 1. Campus Network Design

An enterprise campus generally refers to a network in a specific geographic location. It can be within one building or span multiple buildings near each other. A campus network also includes the Ethernet LAN portions of a network outside the data center. Large enterprises have multiple campuses connected by a WAN. Using models to describe the network architecture divides the campus into several internetworking functional areas, thus simplifying design, implementation, and troubleshooting.

The Hierarchical Design Model

Cisco has used the three-level Hierarchical Design Model for years. The hierarchical design model divides a network into three layers:

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