How does SD-WAN change the approach to QoS compared to traditional MPLS WAN? Explain application-aware routing, dynamic path selection, and how QoS policies are implemented in an SD-WAN architecture.

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SD-WAN fundamentally changes QoS by shifting from static, per-link traffic management to dynamic, application-aware traffic optimization across multiple WAN paths. While traditional QoS focuses on prioritizing traffic within a single link, SD-WAN adds the dimension of choosing…