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Van Jacobson algorithm, 413
variable bit rate (VBR), 589
variable-length subnet mask (VLSM), 258, 258–262, 268, 590
design considerations, 262–266
example, 265
for OSPF, 371
structure, 266–274
subnet adjustment, 263
VBR (variable bit rate), 589
VCC (Virtual Channel Connection), 589
VCI (Virtual Circuit Identifier), 47
vendor code, 130
VIP (Versatile Interface Processor) cards, 227, 589–590
virtual addressing, 130–131. See also logical addresses
virtual channel, 47
Virtual Channel Connection (VCC), 589
virtual circuit, 125, 590
LMI messages on, 240
Virtual Circuit Identifier (VCI), 47
virtual LANs (VLANs), 88–95, 590
broadcast control, 90–91
flexibility and scalability, 92–95
identifying, 96–100
frame tagging, 98
Inter-Switch Link (ISL) protocol, 99–100
methods, 98–99
memberships, 95–96
security, 91–92
Virtual Path Identifier (VPI), 47
virtual ring, 590
VLAN ID, 98
VLAN Management Policy Server, 96
VLSM (variable-length subnet mask), 258, 258–262, 268, 590
design considerations, 262–266
example, 265
for OSPF, 371
structure, 266–274
subnet adjustment, 263
VoATM (Voice over ATM), 493, 590
VoFR (Voice over Frame Relay), 493, 590
voice, 490–495
data network integration with, 493–495
exam essentials, 496
traditional technologies, 491–492
voice mail, 492
Voice over ATM (VoATM), 493, 590
Voice over Frame Relay (VoFR), 493, 590
Voice over IP (VoIP), 493, 590
packet loss, 419
quality of service for, 83
VPI (Virtual Path Identifier), 47
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