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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. Network virtualization - Wikipedia

   en.wikipedia.org/wiki/Network_virtualization

   Using this technology, a system administrator can configure systems physically attached to the same local network into separate virtual networks. Conversely, an administrator can combine systems on separate local area networks (LANs) into a single VLAN spanning segments of a large network.

4. Overlay network - Wikipedia

   en.wikipedia.org/wiki/Overlay_network

   An overlay network is a computer network that is layered on top of another (logical as opposed to 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. [1]

5. 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.

6. Carrier Ethernet - Wikipedia

   en.wikipedia.org/wiki/Carrier_Ethernet

   Ethernet Virtual Private LAN or E-LAN: a multipoint service connecting a set of customer endpoints, giving the appearance to the customer of a bridged Ethernet network connecting the sites. Ethernet Virtual Private Tree or E-Tree : a multipoint service connecting one or more roots and a set of leaves, but preventing inter-leaf communication.

7. 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.