Which statement is correct about overlay or underlay networks or fabrics?

Which statement is correct about overlay or underlay networks or fabrics?
A . Underlay fabrics decouple network services from the overlay infrastructure.
B . Overlay networks are Layer 3 networks that must use OSPF for routing purposes.
C . Underlay fabrics enable multitenancy through virtualization.
D . Overlay networks are virtual networks.

View Answer

Answer: D

Explanation:

Overlay networks are indeed virtual networks. They are logical constructs that stitch together

disparate, dispersed network infrastructure, often referred to as underlay1. Underlay networks refer to the physical network infrastructure, while overlay networks implement network virtualization concepts2. Reference from Juniper site: Baeldung on Computer Science, PacketFabric, Cisco, HPE Aruba Networking