Which statement describes the overlay network in the Cisco SD-Access architecture?

The overlay network in Cisco SD-Access is built on top of the underlay network and uses VXLAN to create virtual networks (VNs). This allows for complete separation and isolation of different traffic types or user groups, enhancing security and simplifying network management. The overlay is independent of the physical underlay topology, meaning changes in the underlay don't directly impact the logical network services. Incorrect options: Multicast support for Layer 2 flooding in the underlay is not the primary function of the overlay; the overlay itself handles Layer 2 extension and flooding within VNs. A traditional routed access design is characteristic of older network architectures, not the software-defined, virtualized approach of SD-Access overlays. A group of physical routers and switches describes the underlay network, which provides the physical connectivity for the overlay.