What best describes SD-WAN in relation to SDN and cloud migration?

• A. An extension of SDN practices to connect to entities spread across the internet to support WAN architecture especially related to cloud migration.
• B. A LAN protocol used within data centers.
• C. A VPN standard for remote access.
• D. A hardware router for WAN connections.

Answer: (A)

SD-WAN brings SDN concepts to the wide area network, providing centralized control, an overlay network, and policy‑driven routing across multiple transport links. This approach is especially helpful for cloud migration because it enables direct, secure, and efficient access from branch sites to cloud services, without forcing all traffic through a central data center. It supports application-aware routing, dynamic path selection, and centralized management, reducing reliance on expensive MPLS while improving performance and flexibility for cloud workloads. It’s not simply a LAN protocol inside data centers, not a standalone VPN standard, and not just a hardware router; it’s the application of SDN principles to WAN connectivity with cloud‑optimized capabilities.