In Cisco Software-Defined Access (SDA), which term refers to the functions that deliver endpoint packets across the network using tunnels between the ingress and egress fabric nodes?
- Fabric
- Overlay
- Underlay
- VXLAN
Explanation: The overlay includes the control plane and data plane features to locate the endpoints, decide to which fabric node a VXLAN tunnel should connect, direct the frames into the tunnel, and perform VXLAN tunnel encapsulation and de-encapsulation. The SDA underlay exists as network devices, links, and a separate IP network to provide connectivity between nodes to support the VXLAN tunnels.
The fabric includes both the underlay and overlay, while VXLAN refers to the protocol used to create the tunnels used by the overlay.
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