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GLOSSARY
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WD SENTINEL DX4000
ADMINISTRATOR’S GUIDE
RAID 5— For systems with three or more drives, RAID 5 offers fast performance by striping
data across all drives. It protects data by dedicating a quarter of each drive to fault
tolerance, leaving three quarters of the system capacity available for data storage.
RAM—Random Access Memory. Memory that allows any storage location to be accessed
randomly, as opposed to sequential access devices such as tape drives.
ROM—Read-Only Memory. An integrated circuit memory chip containing programs and
data that the computer or host can read but cannot modify. A computer can read
instructions from ROM but cannot store data in ROM.
Share—An area, similar to a folder or directory, set up to organize files and access them on
your network. Shares can be Public, shared with everyone on your network, or Private,
shared with only selected users on your network.
SMB—Server Message Block. File-sharing protocol for Windows platform that allows users
to access shares through My Network Places. Mac OS X or later also supports the CIFS
protocol. See also Protocol.
SMTP—Simple Mail Transfer Protocol. Standard for transferring email across the Internet.
See also Protocol.
Streaming Media—Media such as audio, video, and photos that are constantly received
while being delivered by a streaming provider.
Striping—The spread of data over multiple hard drives to improve performance. See also
RAID 0.
TCP/IP—Transmission Control Protocol/Internet Protocol. A set of protocols for
communication over interconnected networks. The standard for data transmission over
networks. See also Protocol.
UPnP—Universal Plug n Play. A set of computer network protocols that simplify the
implementation of networks in the home by allowing devices to connect seamlessly. See
also Protocol.
WAN—Wide Area Network. A computer network that crosses metropolitan, regional, or
national boundaries.