A network architect is planning a complete access layer and core upgrade for customer’s campus LAN. The campus has four large buildings, each requiring between 1000 and 3000 edge ports. Which factor will play a primary role in determining whether the network architect needs to plan a two-tier or three-tier topology for the campus LAN?
A. The number of fiber links between each building and the building where the core switches reside
B. Whether the customer requires a wireless solution
C. The high number of edge ports that the solution requires
D. Whether the customer can afford core switches that support intelligent Resilient Framework (IRF)