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Glossary
EN/LZT 108 6429 R1 47 (47)
May 2003
USB
Short for Universal Serial Bus, an external bus standard that supports data transfer
rates of 12 Mbps. A USB port can be used to connect peripheral devices, such as
mice, modems, and keyboards. USB also supports Plug-and-Play installation and hot
plugging.
User name
A name used to gain access to a computer system. User names (and often passwords)
are required in multiuser systems.
VPI and VCI
A VPI (Virtual Path Identifier) is an 8-bit field while VCI (Virtual Channel
Identifier) is a 16-bit field in the ATM cell header. A VPI identifies a link formed by
a virtual path and a VCI identifies a channel within a virtual path. A unique and
separate VPI/VCI identifier is assigned in advance to indicate which type of cells
follow.
WAN
Short for Wide Area Network, a computer network that spans a relatively large
geographical area. Typically, a WAN consists of two or more local-area networks
(LANs).