Abbreviation
or Acronym
Term
VAC
volts alternating current
VBR
variable bit rate
VBR-NRT
variable bit rate, non–real time
VBR-RT
variable bit rate, real time
VC
virtual circuit (or connection)
VCC
virtual channel connection
VCCI
Voluntary Control Council for Interference
VCD
virtual circuit descriptor
VCI
virtual channel identifier
VDC
volts direct current
VDSL
very-high-bit-rate digital subscriber line
VLAN
virtual local area network
VoIP
voice over Internet Protocol
VOQL
virtual output queue length
VP
virtual path
VPC
virtual path connection
VPI
virtual path identifier
VPN
virtual private network
VR
virtual router
VRF
VPN routing and forwarding instance
VRID
virtual router identifier
VRRP
Virtual Router Redundancy Protocol
VSA
vendor-specific attribute (RADIUS)
VT
virtual tributary
VTS
VPN Tunnel Server
vty
virtual terminal
W
WAN
wide area network
Appendix A: Abbreviations and Acronyms
569
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