An overlay network is a digital network that is built on high of one other network. Nodes in the overlay network are connected by virtual or logical links. Each hyperlink corresponds to a path, perhaps through many bodily links, in the underlying network. The topology of the overlay network could differ from that of the underlying one. They are organized as nodes of a virtual system of links that run on top of the Internet. Campus space networkA campus area network is made up of an interconnection of LANs inside a limited geographical area.
- They are organized as nodes of a virtual system of hyperlinks that run on top of the Internet.
- The physical layout of the nodes in a network could not necessarily mirror the network topology.
- Newer requirements corresponding to ITU-T G.hn additionally present a way to create a wired LAN using existing wiring, similar to coaxial cables,