Which SD-WAN component manages the overlay control plane and WAN Edge connectivity?
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Correct answer: vSmart.
Why this is the answer
The vSmart controller is the correct answer because it establishes, maintains, and manages the SD-WAN overlay control plane. It uses OMP (Overlay Management Protocol) to exchange routing, policy, and security information with WAN Edge devices, enabling them to build the data plane tunnels. APIC-EM is a Cisco controller for traditional campus and branch networks, not SD-WAN. vManage is the centralized network management system for configuration, monitoring, and troubleshooting. vBond is the orchestrator that performs initial authentication and authorizes all other SD-WAN components.
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