Which Cisco SD-WAN feature dynamically reroutes application traffic when SLA thresholds are exceeded?

• A. BPDU Guard
• B. VRF leaking
• C. OSPF SPF throttling
• D. App-aware routing

Answer: (D)

The main concept tested here is app-aware routing in Cisco SD-WAN. This feature makes routing decisions based on how the applications actually perform over the network, not just on raw link metrics. It uses per-application SLAs—such as acceptable latency, jitter, and loss—and continuously monitors each path (MPLS, broadband, LTE, etc.) to see if those SLAs are being met.

When an application’s traffic begins to miss its SLA on a given path, the system dynamically reroutes that traffic to a different path that can meet the required performance. This per-application, real-time decision-making lets critical apps (like voice or video) stay within their performance targets while less-sensitive traffic can use other available links, providing both SLA assurance and optimal use of multiple WAN connections.

Other options aren’t about adapting traffic based on application performance. BPDU Guard protects switch-facing protocols, VRF leaking deals with routing table isolation between VRFs, and OSPF SPF throttling relates to routing algorithm behavior, not dynamic application-aware path selection in SD-WAN.