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Appendix
8
C300 8-7
Appendix Chapter 8
DNS Abbreviation for Domain Name System. A system that acquires the
supported IP addresses from host names in a network environment.
DNS allows the user to access other computers over a network by
specifying host names, instead of difficult to memorize and under-
stand IP addresses.
DPI (dpi) Abbreviation for Dots Per Inch. A resolution unit used by printers and
scanners. Indicates how many dots per inch are represented in an
image. The higher the value, the higher the resolution.
Driver Software that works as a bridge between a computer and a periph-
eral device.
Ethernet LAN transmission line standard
File Extension The characters added to the file name in order to differentiate file for-
mats. The file extension is added after a period, for example, “.bmp”
or “.jpg”.
FTP Abbreviation for File Transfer Protocol. A protocol for transferring
files over the Internet or an intranet on the TCP/IP network.
Gradation The light and dark levels of an image. As the number increases,
smoother brightness variations can be reproduced.
Grayscale Monochrome image expressive form using the gradation information
from black to white
Halftone The method of producing the light and dark parts of an image
through varying sizes of black and white dots
Hard Disk Large capacity storage device for storing data. The data can be
stored even if the power is turned off.
HTTP Abbreviation for HyperText Transfer Protocol. A protocol used to
send and receive data between a Web server and a client (Web
browser). Documents containing images, recordings, and video clips
can be exchanged with the expressive form information.
Install To install hardware, operating systems, applications, printer drivers
on to a computer
IP Address A code (address) that is used to identify individual network devices
over the Internet. A maximum of three digits for four numbers are
displayed such as 192.168.1.10. IP addresses are assigned to devic-
es, including computers, which are connected to the Internet.
J2RE Abbreviation for Java 2 Runtime Environment. One type of JavaVir-
tual Machine (Java VM) in a program operating environment written
in the object-oriented language Java, developed by Sun Microsys-
tems. This is required to run applications that were created with
Java.
Java A programming language developed by Sun Microsystems that runs
on most computers regardless of the installed hardware and operat-
ing system. However, in order to run Java applications, an operating
environment called “Java Virtual Machine (Java VM)” is required.
JPEG Abbreviation for Joint Photographic Experts Group. One of the file
formats for saving image data. (The file extension is “.jpg”.) The com-
pression ratio is roughly 1/10 to 1/100. This format uses an effective
method in the compression of continuous-tone images, such as
photographs.
Term Definition