Digital Equipment DEC 3000 Series Service Information page 402

AUI (Attachment Unit Interface) Ethernet network
An IEEE standard 802.3-compliant Ethernet network made of
standard Ethernet cable, as opposed to ThinWire Ethernet cable.
Also called standard Ethernet. Compare with ThinWire Ethernet
network. See standard Ethernet network or thickwire Ethernet
network.
autoboot
The process by which the system boots automatically.
backup copy
A copy of files or software made for safekeeping. Making a backup
copy of the data stored on your disk allows you to recover that
data after an accidental loss. You can make backup copies on tape
cartridges.
baud rate
The speed at which signals are serially transmitted over a
communications line. Baud rates can be measured in bits per
second or characters per second. One baud equals one bit per
second; eight bauds equals one character per second.
bit
A binary digit; the smallest unit of information in a binary system
of notation, designated as a 0 or a 1.
boot
Short for bootstrap, meaning to bring a device or system to a
defined state where it can operate on its own.
boot (or bootstrap) device
The memory storage device that holds the software that carries
out a system bootstrap procedure.
boot flag
An indicator bit, set by the system manager, that contains
information that is read and used by the bootstrap software
during a system bootstrap procedure. Default boot flags should
already be set when you receive your system.
bootp
An Internet protocol used for network booting. It is based on UDP
(the Internet User Datagram Protocol) which is a simple, reliable
datagram protocol. The bootp protocol allows a diskless machine
to find its Internet address, the address of a bootserver, and the
name of a file to boot.
buffer
An internal memory area used for temporary storage of data
records during input or output operations.
Glossary–2