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