Refer to the exhibit.

A network architect is designing the logical topology for a campus LAN networking solution. The
solution includes:
80 HP 5500-48G EI switches at the access layer
20 access layer Intelligent Resilient Framework (IRF) virtual devices (four members in each IRF)
3840 edge ports total
The solution must support VoIP phones as well as desktop computers.

Which VLAN design shown in the exhibit meets the customer needs and also follows best
practices?

A.
Design 1

B.
Design 3

C.
Design 4

D.
Design 2