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What is a characteristic of the overlay network in the Cisco SD-Access architecture?
Correct Answer: C
The overlay network in Cisco SD-Access architecture is a virtual and tunneled network that interconnects network devices virtually, forming an SDA fabric. This overlay network enables policy-based network segmentation, host mobility across wired and wireless networks, and improved network security compared to traditional network switching and routing capabilities. It is designed to overcome the complexity and constraints of the underlay network, providing a level of isolation among virtual networks and independence from the physical network infrastructure.