Glossary
GL-12
Cisco 6260 Hardware Installation Guide
OL-2365-02
D
daemon
A program that is not invoked explicitly but lies dormant waiting for some condition(s) to occur.
daisy-chain
topology
A method of connecting devices in a series so that signals are passed through the chain from one
device to the next. Unlike a ring topology, the last device in the series is not connected to the first.
Compare with
bus topology
,
ring topology
,
star topology
, and
tree topology
.
data
circuit-terminating
equipment
See
DCE
.
data storage backup
Process of making a copy of the data that resides on a server.
data terminal
equipment
See
DTE
.
DCE
Data circuit-terminating equipment (ITU-T expansion). Devices and connections of a
communications network that comprise the network end of the user-to-network interface. The DCE
provides a physical connection to the network, forwards traffic, and provides a clocking signal used
to synchronize data transmissions between DCE and DTE devices. Modems and interface cards are
examples of DCE. Compare with
DTE
.
DDTS
Distributed Defect Tracking System. Cisco tracks bugs in a variety of products, including router
software, communication server software, and network management software, using a system called
DDTS. DDTS is also used for bugs in some hardware and microcode products, and for bugs in some
internal tools, including the automated test software and various Software Tools.
destination address
Address of a network device that is receiving data. See also
source address
.
DHCP
Dynamic Host Configuration Protocol. Provides a mechanism to allocate IP addresses dynamically so
that addresses can be reused when hosts no longer need them. Defined in RFC 2131.
digital signal level 3
See
DS3
.
digital subscriber
line
See
DSL
.
digital subscriber
line access
multiplexer
See
DSLAM
.
Discrete Multitone
See
DMT
.
Distributed Defect
Tracking System
See
DDTS
.
distributed server
Server that supports a specific group of users on the network. Also referred to as local or
workgroup server.
DMT
Discrete Multitone. A technology that uses digital signal processors to transmit more than 6 Mbps of
video, data, image, and voice signals over existing one pair copper wiring. DMT supports ADSL
line coding.