Glossary
T
TB
Terabyte. Approximately one trillion
(1,000,000,000,000) bytes. Used to describe
the storage capacity of hard disk drives. A tera-
byte is usually computed as 1012
(1,000,000,000,000) bytes, but can also be
computed as 240 (1,099,511,627,776) bytes
(often called a “binary terabyte” and abbre-
viated TiB).
TCP/IP
Transmission Control Protocol/Internet Pro-
tocol. The set of communications protocols
used for the Internet and other similar net-
works. TCP provides reliable delivery of mes-
sages between networked computers. IP uses
numeric IP addresses to join network seg-
ments.
U
U
Unit. The standard unit of measure for des-
ignating the vertical usable space, or height, of
racks. 1U is equal to 1.75 inches. A device that
is described as being 1U in height may be
shorter than 1.75 inches, but, due to the design
of most racks, will still take up 1.75 inches of
rack space.
W
WAN
See wide area network.
wide area network
A telecommunication network that covers a
broad area or that links across metropolitan,
regional, or national boundaries. Wide area net-
works are used to connect local area networks
and other types of networks together, so that
users and computers in one location can com-
municate with users and computers in other
locations.
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Part Number: P0450141, Rev. B
Nexsan BEAST™ and E-Series™
