V
- very high data-rate digital subscriber line (VDSL)
A DSL technology that provides faster data transmission over a single flat untwisted or twisted pair of copper wires. VDSL is capable of supporting high-bandwidth applications such as HDTV as well as telephone services (Voice over IP) and general Internet access over a single connection.
- virtual circuit
A logical circuit devised to ensure reliable communication between two devices on a network. Defined by a virtual path identifier/virtual channel (really the only time channel is used) identifier (VPI/VCI) pair, a virtual circuit can be permanent (PVC) or switched (SVC). Virtual circuits are used in frame relay and X.25. Known as virtual channel in ATM. See also permanent virtual circuit ...
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