Short for variable bit rate, or Class B quality of service, an ATM bandwidth-allocation service that allows users to specify a throughput capacity (i.e., a peak rate) and a sustained rate but data is not sent evenly. VBR is often used when transmitting compressed packetized voice and video data, such as videoconferencing.
Compare with ABR, CBR and UBR.
Short for vertical blanking interval, the part of a television transmission signal that is blanked, or left clear, of viewable content, to allow time for the television’s electron gun to move from the bottom to the top of the screen as it scans images. This blank area is now being used to broadcast closed caption […]
Short for Virtual Address eXtension, Digital Equipment Corporation’s successor to its PDP-11 line of minicomputers. As its name implies, VAX systems feature an operating system — VMS — that supports virtual memory. The VAX was introduced in 1977 and reached its pinnacle of success in the mid-1980s. It has been eclipsed by RISC -based workstations, […]
Virus Application Programming Interface, or Virus API (VAPI) is also referred to as Antivirus API (AVAPI), or Virus Scanning API (VSAPI). Virus Scanning API 1.0 was introduced in Microsoft Exchange Server 5.5 Service Pack 3 (SP3) and was standard until the release of Exchange 2000. Many improvements have been made to Virus Scanning API 1.0 […]
(pronounced as one word) Short for value-added reseller, VARs typically load applications or proprietary software onto computers and may also incorporate third-party options to design a complete solution for a client. This “value-added” system is often customized for a specific application, but is sold to the VAR’s customer base under the original design manufacturer brand; […]
- VAN access point
A VAN (Value Added Network) access point is the subscriber’s connection to the VAN and represents the networking endpoint of a VAN.