VishingExactly like Phishing and SMShing, however instead of email or SMS messages, the victim is called on the phone and instructed to give up their personal…
VisibilityThe distance at which a given standard object can be seen and identified with the unaided eye
Visibility Range (or Visibility)The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizons sky in daylight.
visibility timeoutThe period of time that a message is invisible to the rest of your application after an application component gets it from the queue.
Visible Electro- OpticsTechnologies/techniques employed by optical sensors in the visible portion of the wavelength spectrum.
visible spectrumThe region of the electromagnetic spectrum that can be perceived by human vision, approximately the wavelength range of 0.4 m to 0.7 m.
visual channelA means for delivering video frames from one point to another; a sequence of frames submitted to the channel input results in a similar (not necessarily…
visual telephone servicesA group of audiovisual services including videophone as defined in ITU-T Recommendation F.
Vital RecordA record that is essential to the organizations operation or to the reestablishment of the organization after a disaster.
vital recordsRecords necessary to the life or continuity of an organization.
vital records centerA repository for housing records classified as vital to an organization's operations.
vitreous silicaGlass consisting of almost pure silicon dioxide (SiO2). Synonym fused silica.
VLANVirtual local area network. A LAN created via software rather than dedicated hardware.
VLAN (virtual local area network)partitioning available network resources into independent groups to insulate related traffic and reduce management complexity.
VO (Virtual Organization)A virtual entity whose users and servers are geographically apart but share their resources collectively as a larger grid.
vocabularyAll of the values associated with documents in a workspace. These may include property values, document profiles, categories, and other keywords.
Vocabulary (of a graph)Set of classes and properties which occur as the subject, predicate or object of any triple in an RDF graph.
vocoderAbbreviation for voice-coder. A device that usually consists of a speech analyzer, which converts analog speech waveforms into narrowband digital signals…
VODVideo On Demand. A previously recorded media stream that users can request at a time most convenient to them.
vodasAcronym for voice-operated device anti-sing. A device used to prevent overall voice-frequency singing in a two-way telephone circuit by ensuring that…
vogadAcronym for voice-operated gain-adjusting device. A device that has a substantially constant output amplitude over a wide range of input amplitudes.
voice frameA UIH (unnumbered information with header check) frame that contains a voice packet in its information field. [T1.312-1991]
voice frequency (VF)Pertaining to those frequencies within that part of the audio range that is used for the transmission of speech.
voice frequency (VF) primary patch bayA patching facility that provides the first appearance of local-user VF circuits in the technical control facility (TCF).
voice gradeIn the public regulated telecommunications services, a service grade that is described in part 68, Title 47 of the Code of Federal Regulations [CFR].
voice information fieldThe field within a voice packet that contains blocks arranged according to the significance of the bits: the first block contains the most significant…
voice mailA system that records and stores telephone messages in a user mailbox. [Exchange 2007]
voice messageAn electronic message with a primary content of digitized audio. [Exchange 2007]
voice message originatorAn e-mail address that is used on call answering messages. The voice message originator is used as the "From" field for Unified Messaging messages and is…
voice-frequency telegraph (VFTG)A method of multiplexing one or more dc telegraph channels onto a nominal 4-kHz voice frequency channel. Synonym voice frequency carrier telegraph.
VoidInvalid; a void agreement is one for which there is no remedy.
void contextA form of "scalar context" in which an "expression" is not expected to return any "value" at all and is evaluated for its "side effects" alone.
VoIP (Voice over IP)The practice of using an IP data network to transmit voice calls. [Exchange 2007]
VoIP gatewayA computer device that converts between circuit switch telephony protocols and VoIP protocols. [Exchange 2007]
volatileA solid or liquid material that easily vaporizes.
volatile storageA storage device in which the contents are lost when power is removed.
VolatilityThe term volatility indicates how much and how quickly the value of an investment, market, or market sector changes.
VolumeVolume is the number of shares traded in a company's stock or in an entire market over a specified period, typically a day.
volume copyA way of copying both data in the active file system and data in snapshots from one volume to another. Implemented using the volcopy command.
volume groupIn LVM, a set of physical volumes such that logical volumes can be defined within the volume group for user access.
volume master keyAn advanced encryption standard (AES) 256-bit key that is used by BitLocker Drive Encryption to encrypt the full volume encryption key.
volume unit (vu)A unit of measurement of the power of an audio-frequency signal, as measured by a vu meter.
VPIVirtual path identifier. A field in the ATM cell header that indicates the virtual path over which the cell should be routed.
VPN (Virtual Private Network)A secure network that is constructed by using public wires to connect nodes. For example, there are a number of systems that enable creation of networks…
VPN connectionAlthough VPN connection is a general term, we specifically mean the IPsec connection between a VPC and some other network, such as a corporate data…
VSAPI (Virus Scanning API)A virus-scanning API that is used by third-party antivirus service providers to protect computers that have the Exchange Server 2007 Mailbox server role…
VsnapVirtual snapshot: space-efficient snapshot available on Enterprise Virtual Array family products
VSS (Volume Shadow Copy Service)The Volume Shadow Copy Service provides the backup infrastructure for the Microsoft Windows XP and Microsoft Windows Server 2003 operating systems, as…
VTD (Virtual Tape Drive)an emulation of a physical transport in the virtual tape storage subsystem (VTSS) that looks like a physical tape transport to the host.
VTOC (Volume Table Of Contents)the data set on a DASD volume that specifies the location of all non-SMS data sets on that volume. See VVDS.
VTOL-UAVVertical Takeoff and Landing Unmanned Aerial Vehicle.
VTS (Virtual Tape Servers or Systems)comprise: a robotic library to perform automated tape mounts for backend requirements; real tape transports that read and write virtual volumes from…