- Daemon
- A background process waiting for a client to
start-up the service, such as the pop 3 daemon, which runs continually, but is
activated only when people retrieve e-mails using an e-mail client.
- Data Encryption Key
- A string used to mathematically encode a message so
that it can only be decrypted by someone with either the same key (symmetric
encryption) or with a related key (asymmetric encryption).
- Data Encryption Standard
- Encryption scheme, developed by IBM in the 1970s.
- Database
- Collection of data formatted in a special way, to
make it easier to retrieve a particular piece of information.
- Dedicated Line
- A phone line that connects two computers permanently
to keep up service.
- Demilitarized Zone
- Zone in multi-layered firewalls, which contains
public Internet services.
- DES
- See data encryption standard.
- DHCP
- See dynamic host configuration protocol.
- DHTML
- See dynamic hypertext markup language.
- Dial-Up
- A temporary connection between two computers
established over a phone line.
- Digerati
- The digital elite, invented by Wired
magazine. Derived from the word literati.
- Digital Certificate
- File containing information about its owner that
can be used to identify the owner. See also certificate authority, SSL.
- Digital Signal Processor
- A separate processor, built into some sound cards,
that relieves audio processing from the computer's CPU.
- Digital Versatile Disk
- A new standard for recording video on CD-ROM's
using MPEG2, thus boasting better-than-broadcast TV quality. Costing about the same
as a CD, DVD-ROM's hold 8 to 40 times more data. DVD will replace videocassettes,
laserdiscs, CD-ROM's and audio CD's.
- Disk Operating System
- Outdated operating system with a command line
interface. See also operating system.
- Dithering
- If a color is not available, it can be made from the
available colors by placing a pattern of colors next to each other to visually mix.
For instance the illusion of "orange" can be made by placing red and yellow pixels
next to each other.
- DMZ
- See demilitarized zone.
- DNS
- See domain name system.
- Domain Name
- The name of a computer connected to the Internet.
The Domain name is used to form a URL. See also URL.
- Domain Name System
- Database that links IP addresses and domain names.
See also domain name, IP.
- DOS
- See disk operating system.
- Download
- To receive files from another computer on the
Internet by actively requesting it.
- DSP
- See digital signal processor.
- DVD
- See digital versatile disk.
- Dynamic Host Configuration Protocol
- Internet standard, based on RFC 1541, for the
automatic allocation of IP addresses.
- Dynamic Hypertext Markup Language
- An extension to HTML, which allows a better user
interaction and introduces dynamic web page creation.
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