When an SDN-based model is used to transmit multimedia traffic, which aspect should an architect consider while designing the network?

Security is a general network design concern not specifically tied to the quality-sensitive nature of multimedia traffic in an SDN model.

QoE estimation allows an SDN controller to dynamically assess end-user perceived quality of multimedia streams such as video or voice and make intelligent forwarding or resource allocation decisions to maintain acceptable perceptual quality. SDN's centralized control plane is uniquely suited to incorporate real-time QoE metrics into traffic engineering policies, distinguishing multimedia network design from general-purpose designs.

Traffic patterns are a baseline consideration relevant to all traffic types and do not represent the differentiating design aspect specific to multimedia in SDN.

Flow forwarding is a fundamental SDN mechanism that applies to all traffic types equally and is not the distinguishing design consideration for multimedia quality.