Dedicated Line
A dedicated line is a permanent connection to the Internet
using an individual, separate phone line.
DHTML
Stands Dynamic Hypertext Mark-up Language.
DHTML is an HTML extension that allows web pages to react
to the end users' input, such as displaying a web page based
on the type of browser or computer end users are viewing
a page with.
Directory
A directory (such as Yahoo, commonly mistaken for a search
engine) depends on people for listings. The main difference
between a search engine and a directory is that a directory
does not make use of a spider or
robot. One of the defining characteristics of a directory
is that it is usually divided into categories.
Dithered/Dithering
In order to display a full-color graphic image on a 256-color
monitor, computers must simulate the colors it cannot display.
They do this by dithering which is combining pixels
from a 256-color palette into patterns that approximate other
colors. At a distance, the human eye merges the pixels into
a single color. Up close, the graphic image will appear pixelated
and speckled.
DNS
Stands for Domain Name System. The
DNS translates URL text addresses (such as grantasticdesigns.com)
into a numeric Internet address (such as 201.214.12.6).
Doorway Page
Web pages created specifically for search engine positions.
Also known as gateway page or a bridge page.
DPI
Stands for dots per inch. DPI specifies
the resolution of an output device, such as a printer
or printing press machine. Print resolution usually runs
from 300-1200 dots per inch on a Laser Printer and 125-225
dots per inch for photographic images on a print brochure.
(For information on input device measurements see ppi.)
Drop-Down Menu
In an online form, a drop-down menu (also known as a pull-down
menu) looks like the following:
If you click your mouse on the arrows, you will be able
to select a product or service. Drop-down menus are commonly
used for web site navigation.
Drop Shadow
A drop shadow gives an image depth by creating a shading
offset behind a selected image.
Duotone
The application of two colors to provide richer tones than
a monotone (single-color image, usually grayscale)
can provide. A good duotone image can simulate a wider range
of the color spectrum than two colors used separately. Duotones
also use a hue (color)
to set the mood for a photo in a more stunning way than a
full-color image can.
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