- Virtual Private Network (VPN) Concentrator A networking device that creates a secure end for multiple VPN connections, providing capabilities like data encryption and tunneling protocols. It is often used in scenarios where numerous VPN connections are required, such as for remote workers or multiple office locations, ensuring secure and efficient network access.
- Virus A type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. Viruses can have harmful side effects, causing harm to system software by corrupting or destroying data, slowing down system performance, or giving attackers access to system resources.
- Virus signature file A file that contains the definitions and characteristics of known viruses, used by antivirus software to identify and block viruses. Virus signature files are used to protect computers and networks from virus attacks. Examples of virus signature files include virus definition files and virus pattern files.
- Vishing A fraudulent practice where perpetrators use a telephone system to deceive individuals into revealing sensitive information. Often, these attackers pretend to represent legitimate organizations, using social engineering techniques to manipulate victims, gain their trust, and access their personal, financial, or security data.
- Visual, Agile, and Simple Threat Modeling (VAST)An approach to threat modeling that emphasizes simplicity, collaboration, and integration with Agile development processes. VAST promotes visualization of threats and vulnerabilities in system design, which enables 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) Emulations of computer systems. They mimic actual computers by replicating the same functionality, enabling them to run applications and programs like a physical machine. This approach allows for more efficient resource utilization by allowing multiple virtual machines to run simultaneously on a single physical host.
- VM (Virtual Machine) Escapes A security breach in which the attacker breaks out of a virtual machine and interacts directly with the host operating system. This can be a serious issue as it can give the attacker access to the host environment and other virtual machines running on the same host, potentially compromising the entire system.
- 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.
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