Which technology is used to provide Layer 2 and Layer 3 logical networks in the Cisco SD-Access architecture?
A . underlay network
B . VPN routing/forwarding
C . easy virtual network
D . overlay network
Answer: D
Explanation:
An overlay network is created on top of the underlay network through virtualization (virtual networks). The data plane traffic and control plane signaling are contained within each virtualized network, maintaining isolation among the networks and an independence from the underlay network.