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2. VLAN - Wikipedia

   en.wikipedia.org/wiki/VLAN

   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 .

3. Switch virtual interface - Wikipedia

   en.wikipedia.org/wiki/Switch_virtual_interface

   A switch virtual interface (SVI) represents a logical layer-3 interface on a switch. VLANs divide broadcast domains in a LAN environment. Whenever hosts in one VLAN need to communicate with hosts in another VLAN, the traffic must be routed between them. This is known as inter-VLAN routing.

4. Virtual Extensible LAN - Wikipedia

   en.wikipedia.org/wiki/Virtual_Extensible_LAN

   Virtual eXtensible LAN (VXLAN) is a network virtualization technology that uses a VLAN-like encapsulation technique to encapsulate OSI layer 2 Ethernet frames within layer 4 UDP datagrams, using 4789 as the default IANA-assigned destination UDP port number, [1] although many implementations that predate the IANA assignment use port 8472.

5. Network virtualization - Wikipedia

   en.wikipedia.org/wiki/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.

6. Virtual Private LAN Service - Wikipedia

   en.wikipedia.org/wiki/Virtual_Private_LAN_Service

   Virtual Private LAN Service (VPLS) is a way to provide Ethernet-based multipoint to multipoint communication over IP or MPLS networks. It allows geographically dispersed sites to share an Ethernet broadcast domain by connecting sites through pseudowires. The term sites includes multiplicities of both servers and clients.

7. Overlay network - Wikipedia

   en.wikipedia.org/wiki/Overlay_network

   Nodes in an overlay network can be thought of as being connected by virtual or logical links, each of which corresponds to a path, perhaps through many physical links, in the underlying network. For example, distributed systems such as peer-to-peer networks are overlay networks because their nodes form networks over existing network connections.