QoS in Software-Defined Networking (SDN) refers to the use of Quality of Service techniques within programmable and centralized network architectures. SDN separates the control plane from the data plane, allowing administrators to manage traffic policies dynamically through software controllers. QoS in SDN helps prioritize critical applications such as voice, video, and cloud services across the network. It uses traffic classification, bandwidth allocation, flow management, and policy-based routing to optimize performance. This approach improves network flexibility, scalability, and resource utilization. QoS in SDN also helps reduce latency, congestion, and packet loss in modern enterprise and cloud environments.
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