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Glossary-5
dequeue
To remove the first entry in a queue and to attempt the function for which the entry was
queued.
DNS
Domain Name System.
An Internet naming system that maps, or translates, domain
names to addresses.
See
domain names.
domain names
Internet.
The domain name consists of a sequence of subnames separated by a period.
The individual sections of the name might represent sites, groups, or computers, but
the domain system simply calls each section a label.
For example, the domain name
super.dec.com
, contains three labels: super, dec, and
com. Any suffix of labels in a domain name is called a domain. Thus, the lowest level
domain is
super.dec.com
, an abbreviation for the computer named super. The second
level domain is
dec.com
(for Digital Equipment Corporation); and the top level domain
is
com
(for commercial institution). As the example shows, domain names are written
with the most local label first and the topmost domain last.
Domain Name System
See
DNS
.
downline loading
The process of sending the
access server image
from a load host to a access server.
DSR
Data Set Ready
. A control signal that is used to inform whether or not a
communications device is ready to transmit and receive data.
DSVCONFIG
The configuration procedure used on a
load host
to configure the load host’s node
database.
DTR
Data Terminal Ready
. A control signal that is used to inform whether or not a data
terminal is ready to transmit and receive data.
dump file
A file containing a copy of the access server memory. The
load host
creates this file
when it receives an upline dump from the access server. The file is stored on the
load
host
in the access server directory.
Ethernet
A type of local area network based on carrier-sense multiple-access/collision detection
(CSMA/CD).