An overlay network is a logical computer network that is layered on top of a physical network. The concept of overlay networking is distinct from the traditional model of OSI layered networks, and almost always assumes that the underlay network is an IP network of some kind.
An overlay network is a logical computer network that is layered on top of a physical network. The concept of overlay networking is distinct from the traditional model of OSI layered networks, and almost always assumes that the underlay network is an IP network of some kind.
Source: Wikipedia "Overlay network" · CC BY-SA 4.0
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