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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.
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.
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.
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 ...
Virtual Extensible LAN (VXLAN) is a network virtualization technology that attempts to address the scalability problems associated with large cloud computing deployments. It 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 ...
Cisco's IPS 4200 Series worked as intrusion prevention systems (IPS). Cisco VPN 3000 Series Concentrators, which provided virtual private networking (VPN). The Cisco ASA is a unified threat management device which combines several network security functions. [3]
Developer (s) Cisco Systems. Introduction. 1994 [ 1] RFC (s) RFC1701, RFC1702, RFC2784. Generic Routing Encapsulation ( GRE) is a tunneling protocol developed by Cisco Systems that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links or point-to-multipoint links over an Internet Protocol network.