Distinct, physical redundancy within a network layer is a key characteristic that contributes to the high availability of the hierarchical network design. Which of the following is not an examples of this model?
A. SAN extension with dual fabrics such as a yellow VSAN and a blue VSAN utilized via multipath software
B. Redundant power supplies and hot-swappable fan trays in Aggregate switches
C. A single SAN fabric with redundant uplinks and switches
D. Servers using network adapter teaming software connected to dual-attached access switches
