A multinational manufacturer has factories in three continents, most traffic flows to two regional data centers, inter-factory traffic is rare, and IT wants simple control with predictable failover. Which SD-WAN control plane and overlay design best matches this traffic pattern?
Select an answer to reveal the explanation.
Short Explanation
You're sending most of your traffic to two busy spots, so you'll want sturdy routes straight to them. A regional hub-and-spoke setup keeps things simple and failover predictable, like spokes on a bike wheel holding steady around the hub.
Full Explanation
Hub-and-spoke with regional hubs aligns the overlay and control policy to dominant traffic toward data centers, simplifying route advertisement, allowing hierarchical control, and providing predictable failover between regional hubs while avoiding unnecessary edge tunnels. Global full-mesh fails by concept because any-to-any tunnels maximize state and overhead despite rare inter-factory flows, complicating control at scale. A single flat overlay with random peering fails by concept because lack of hierarchy harms policy control, troubleshooting, and deterministic failover for continental scale. Internet-only underlay without overlay or controller fails by concept because it abandons centralized control, encryption, and intelligent path selection that define SD-WAN. For the exam, match topology to traffic flows and scaling domains rather than defaulting to mesh. In practice validate hub capacity, affinity policies, and regional failover with measured SLA paths.