An overlay network is a virtual or logical network that is created on top of an existing physical network. The internet, which connects many nodes via circuit switching, is an example of an overlay network. An overlay network is any virtual layer on top of physical network infrastructure. This...
Routing on Overlay Networks What is an overlay network ?Parekh, Abhay
of overlay network is the Resilient Overlay Network. It is an architecture that allows distributed internet applications to identify and recover from disruption in connections and interference. The Resilient Overlay Network has a relatively simple architecture and can be deployed in the form of nodes ...
Underlay Network An underlay network, as the name implies, is the underlying physical infrastructure of overlay networks. As shown in the following figure, an underlay network is a physical network consisting of multiple types of devices and is responsible for data packet transmission between networks...
Overlay networking (aka SDN overlay) is a method of using software to create layers ofnetworkabstraction that can be used to run multiple separate, discrete virtualized network layers on top of the physical network, often providing new applications orsecuritybenefits. ...
What is a VLAN (virtual LAN)? A virtual LAN (VLAN) is a logical overlay network that groups together a subset of devices that share a physical LAN, isolating the traffic for each group. A LAN is a group of computers or other devices in the same place -- e.g., the same building ...
A third type of overlay is an overlay network, a computer network on top of another network. This type of overlay is used with private networks to improve routing. It is also used on the Internet for routing data to a destination that are not specified by an IP address. Normally, this ...
Another example is network overlays. There are various overlay technologies. One industry-standard technology is called virtual extensible local area network (VXLAN). VXLAN provides a framework for overlaying virtualized layer 2 networks over layer 3 networks, defining both an encapsulation mechanism and...
In its simplest form, a wide-area network (WAN) is a collection of local-area networks (LANs) or other networks that communicate with one another.
A network fabric is the mesh of connections between network devices such as access points, switches, and routers that transports data to its destination. "Fabric" can mean the physical wirings that make up these connections, but usually it refers to a virtualized, automated lattice of overlay ...