Which policy is configured to ensure that a voice packet is always sent on the link with less than a 50 msec delay?

Localized data policies are applied to specific WAN Edge devices and influence traffic exiting interfaces on that device, but they do not provide end-to-end path selection based on network-wide link quality.

Localized control policies are applied to specific WAN Edge devices to influence routing information exchanged between local interfaces or to filter routes, not to control data plane forwarding based on link performance.

Centralized data policies, configured on vManage and pushed to vSmart, are used to influence data plane forwarding decisions based on applications, VPNs, or specific traffic parameters, including link quality metrics like delay. By defining a centralized data policy with an SLA class that requires less than 50 msec delay for voice traffic, the SD-WAN fabric can dynamically route these packets to the best-performing path.

Centralized control policies are used to influence routing information (prefixes and TLOCs) within the overlay network, affecting the control plane's understanding of topology and reachability, not directly the data plane's forwarding path selection based on real-time link performance for specific traffic.