Which SD-WAN feature is primarily associated with rerouting applications based on SLA thresholds?

• A. VTP pruning
• B. DHCP snooping
• C. Root Guard
• D. Application-aware routing

Answer: (D)

Application-aware routing in SD-WAN uses real-time visibility into network conditions and the needs of each application. It continuously measures link metrics (latency, jitter, packet loss, bandwidth) and compares them to SLA thresholds. When performance on a path falls outside those SLA targets for an application, the SD-WAN control plane reroutes that application's traffic to a better path, often across multiple WAN types. This policy-based, dynamic routing ensures latency-sensitive apps stay on reliable paths while optimizing overall WAN utilization. The other features listed are not about app-level path selection or SLA-driven rerouting: VTP pruning controls VLAN broadcast domains, DHCP snooping protects DHCP traffic, and Root Guard prevents an unexpected root bridge in Spanning Tree. Therefore, the feature described is application-aware routing.