Which characteristic applies to a traditional WAN but not to a Cisco SD-WAN solution?

Traditional WANs often involve manual, device-by-device configuration of routing protocols, security policies, and Quality of Service (QoS), making them time-consuming to deploy and maintain, especially across a large number of sites. Cisco SD-WAN, conversely, uses a centralized controller (vManage) to push configurations and policies to all devices, significantly reducing configuration time and operational overhead. Centralized reachability, security, and application policies are hallmarks of SD-WAN, not traditional WANs, as SD-WAN aims to simplify management and provide consistent policy enforcement. Similarly, SD-WAN is designed for increased scalability and reduced complexity through its centralized control plane and automated provisioning. Operating over DTLS/TLS authenticated and secured tunnels is a core security feature of SD-WAN, encrypting traffic and authenticating devices, which is not inherently a characteristic of traditional WANs.