V - Definitions
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V
Variable Length Subnet Mask (VLSM)
Variable Length Subnet Mask (VLSM) is a subnet -- a segmented piece of a larger network -- design strategy where all subnet masks can have varying sizes.
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virtual network adapter
A virtual network adapter is software that operates like a physical network adapter within the host operating system (OS) or through an application installed on the endpoint or server.
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virtual network functions (VNFs)
Virtual network functions (VNFs) are virtualized tasks formerly carried out by proprietary, dedicated hardware.
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virtual networking
Virtual networking is the abstraction of network resources from the underlying physical network infrastructure.
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virtual routing and forwarding (VRF)
Virtual routing and forwarding (VRF) is a technology included in Internet Protocol (IP) network routers that enables multiple instances of a routing table to exist in a virtual router and work simultaneously.
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virtual server
A virtual server, also known as a virtual machine (VM), is a partitioned space inside a real server and is transparent to users, replicating the functionality of a dedicated physical server.
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visitor-based networking (visitor-based network)
Visitor-based networking (VBN) is a computer network with high-speed internet access provided by an organization for temporary use by visitors, guests or other users in a public area.
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VLAN (virtual LAN)
A virtual LAN (VLAN) is a logical overlay network that groups together a subset of devices that share a physical LAN, isolating the traffic for each group.
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voice over LTE (VoLTE)
Voice over LTE (VoLTE) is a digital packet technology that uses 4G LTE networks to route voice traffic and transmit data.
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VPN (virtual private network)
A virtual private network (VPN) is a service that creates a safe, encrypted online connection.