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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).
Dynamic Multipoint Virtual Private Network. Dynamic Multipoint Virtual Private Network (DMVPN) [1] is a dynamic tunneling form of a virtual private network (VPN) supported on Cisco IOS -based routers, and Huawei AR G3 routers, [2] and on Unix -like operating systems.
Virtual routing and forwarding. In IP-based computer networks, virtual routing and forwarding ( VRF) is a technology that allows multiple instances of a routing table to co-exist within the same router at the same time. One or more logical or physical interfaces may have a VRF and these VRFs do not share routes.
VLAN Trunking Protocol. VLAN Trunking Protocol ( VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks ( VLAN) on the whole local area network. [1] To do this, VTP carries VLAN information to all the switches in a VTP domain. VTP advertisements can be sent over 802.1Q, and ISL trunks.
2. 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.
The Cisco Nexus series switches are modular and fixed port network switches designed for the data center. Cisco Systems introduced the Nexus Series of switches on January 28, 2008. The first chassis in the Nexus 7000 family is a 10-slot chassis with two supervisor engine slots and eight I/O module slots at the front, as well as five crossbar ...
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.
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.
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