(adj.) Refers to a material that is a poor conductor of electricity. Dielectric materials can be made to hold an electrostatic charge while dissipating minimal energy in the form of heat. Glass, porcelain, mica, rubber, plastics dry air, vacuums and some liquids and gases are dielectric.
- difference score
The value returned by a biometric engine that indicates the degree of difference found between a reference biometric sample (e.g. the data on file) and the data being obtained for comparison. See “Defend Yourself Against Identity Theft” in the “Did You Know…” section of
- differential incremental backup
The backup of all data files that have been modified since the last incremental backup or archival backup. Compare with cumulative incremental backup.
- diffusing update algorithm
Abbreviated as DUAL, the diffusing update algorithm is a routing protocol used by EIGRP to calculate and create routing tables to determine whether a path is looped or loop-free. It also allows a router running EIGRP to find alternate paths without waiting on updates from other routers. The diffusing update algorithm (DUAL) was developed at […]
(adj.) Describes any system based on discontinuous data or events. Computers are digital machines because at their most basic level they can distinguish between just two values, 0 and 1, or off and on. There is no simple way to represent all the values in between, such as 0.25. All data that a computer processes […]
- digital access and cross-connect system (DACS)
A digital switching device in telecommunications for routing T1 lines. The DACS can cross-connect any T1 line in the system with any other T1 line also in the system. DACS can also connect any DS-0 channel or group of channels on a T1 line to any DS-0 time slots of any other line.