The Enterprise Campus functional area is divided into the following modules:

■ Campus Infrastructure—This module includes three layers:

• The Building Access layer
• The Building Distribution layer
• The Campus Core layer

■ Server Farm

■ Edge Distribution (optional)

Enterprise Campus Requirements

As shown in Table, Enterprise Campus module has different requirements. For example, this table illustrates how modules located closer to the users require a higher degree of scalability so that the Campus network can be expanded in the future without redesigning the complete network. For example, adding new workstations to a network should result in neither high investment cost nor performance degradations.

End users (in the Building Access layer) usually do not require high performance or high availability, but these features are crucial to the Campus Core layer and the Server Farm module. The price per port increases with increased performance and availability. The Campus Core and Server Farm require a guarantee of higher throughput so they can handle all traffic flows and not introduce additional delays or drops to the network traffic. The Edge Distribution module does not require the same performance as in the Campus Core. However, it can require other features and functionalities that increase the overall cost.