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Virtual private network (VPN) is a network architecture for virtually extending a private network (i.e. any computer network which is not the public Internet) across one or multiple other networks which are either untrusted (as they are not controlled by the entity aiming to implement the VPN) or need to be isolated (thus making the lower network invisible or not directly usable).
Network functions virtualization (NFV) [ 1] is a network architecture concept that leverages IT virtualization technologies to virtualize entire classes of network node functions into building blocks that may connect, or chain together, to create and deliver communication services. NFV relies upon traditional server- virtualization techniques ...
Network virtualization. In computing, network virtualization is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network. Network virtualization involves platform virtualization, often combined with resource virtualization.
Data link layer. 1. Physical layer. A virtual local area network ( VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer ( OSI layer 2 ). [ 2][ 3] In this context, virtual refers to a physical object recreated and altered by additional logic, within the local area network.
Virtual organization. A virtual organization is a temporary or permanent collection of geographically dispersed individuals, groups, organizational units, or entire organizations that depend on electronic linking in order to complete the production process ( working definition [ 1] ). Virtual organizations do not represent a firm’s attribute ...
Network topology is the topological [ 4] structure of a network and may be depicted physically or logically. It is an application of graph theory [ 3] wherein communicating devices are modeled as nodes and the connections between the devices are modeled as links or lines between the nodes. Physical topology is the placement of the various ...
A virtual private network (VPN) is an overlay network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network (e.g., the Internet) instead of by physical wires. The data link layer protocols of the virtual network are said to be tunneled through the larger network.
Virtual Distributed Ethernet. Virtual Distributed Ethernet ( VDE) is a set of programs to provide virtual software-defined Ethernet network interface controllers (NICs) across multiple devices, typically computers, which are either virtual or physical. It forms part of the Virtual Square [1] project from the Italian Bologna University whose ...
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