A. SDN establishes a loop-free, non-baking architecture using Transparent interconnection of Lots of Links (TRILL) or Shortest Path Bridging (SPF3), as the company chooses.

B. SDN applications can automate the scripting of CLI commands- that adjust QoS policies as necessary

C. SDN applications can determine which traffic flows require prioritization and then program the infrastructure to prioritize these flows.

D. SDN adds three additional priority classes, specific to voice, video and collaboration, in addition to the eight classes provided by traditional QoS mechanisms.