The FREE Cybersecurity Glossary by Thor Pedersen!

Visual, Agile, and Simple Threat Modeling (VAST): An approach to threat modeling that emphasizes simplicity, collaboration, and integration with Agile development processes. VAST promotes the visualization of threats and vulnerabilities in system design, allowing for team-wide understanding and continuous iteration of threat models alongside system development.

VLAN hopping: A network exploit in which an attacker is able to send packets to or receive packets from a VLAN that they should not have access to, thus breaching a network's segmentation. This could lead to unauthorized access to information, spoofing, or attacks on the network.

VMI (Virtual Machine Introspection): A technique used to monitor the runtime state of a system-level virtual machine. From outside the virtual machine, it inspects the machine's operations, such as memory and disk activity, to spot any unusual or suspicious behavior. This method provides a way of maintaining a high level of security and integrity within the operational environment.

VMs (Virtual Machines): Software-based representations of physical computers, capable of executing applications and processes like their physical counterparts. VMs operate on a physical host machine, allowing multiple virtual machines to operate simultaneously and independently, which can enhance resource efficiency, scalability, and isolation of processes, potentially enhancing overall security.

Voice mail: A service that allows individuals to leave voice messages for other individuals or groups, typically through a telephone or computer system. Voice mail is used to enable communication when the recipient is unavailable or unreachable. Examples of voice mail systems include voicemail boxes, voice mail servers, and voice mail applications.

Voice Over IP (VoIP): A technology that allows voice communication to be transmitted over the internet or other IP-based networks. VoIP is used to enable voice communication over long distances at a lower cost than traditional phone systems. Examples of VoIP systems include Skype, Google Voice, and Vonage.