Glossary Section "V" ( Definitions )
V.35 is a balanced, high speed serial interface. A balanced interface means that there are two leads for each data and clock line. Generally a V.35 port is physically a 34 pin Winchester connector. The V.35 can handle both sync and async data but in practice it is used for sync data.
VAC Volts of Alternating Current
VBR Variable Bit Rate. A data transmission that can be represented by irregular grouping of bits or cell payloads followed by unused bits or cell payloads. Most applications other than voice circuits generate VBR traffic patterns. VBR is an ATM service type and is divided into Real-Time VBR and non-Real-Time VBR, in which the ATM network guarantees to meet the transmitter's bandwidth and Quality of Service requirements.
VCAT Virtual Concatenation
VDC Volts of Direct Current
VCSEL Vertical Cavity Surface Emitting Laser
Veronica A Gopher utility which effectively searches Gopher servers based on a user's list of keywords. The name was chosen to be a "mate" to another utility named "Archie." It later became an acronym for Very Easy Rodent Oriented Netwide Index to Computer Archives.
VG Voice Grade
VGPL Voice Grade Private Line
virtual circuit A network service which provides connection-oriented service regardless of the underlying network structure.
VLAN is a virtual LAN. In other words, connected devices behave as if they are connected to the same physical wire even thought they may be separated by a WAN connection. VLANs also help to improve network security over the WAN.
VLSI Very Large Scale Integration, putting thousands of transistors on a single chip.
VPN Virtual Private Network. VPN allows IP traffic to travel securely over a public TCP/IP network by encrypting all traffic from one network to another. A VPN uses "tunneling" to encrypt all information at the IP level. One of Delta Communications Group's specialties.
VT Virtual Terminal. The OSI
Virtual Terminal Service. Similar to Telnet.
vPOTS Very Plain Old Telephone Service; no switching
VQL Variable Quantizing Level; voice encoding method.
VRML Virtual Reality Modeling Language. VRML is a language much like HTML for getting data on the Web. The 3D nature of VRML is where the two specs depart. Mark Pesce explained VRML to be, "...a language for describing multi-user interactive simulations-virtual worlds networked via the global Internet and hyperlinked within the World-Wide Web."
VSAT Very Small Aperture Satellite.