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LifeBook C1400 Series Notebook - Section Eight
produces a visual image by varying the position and
intensity of the beam.
Data
The information a system stores and processes.
DC
Direct current. A voltage or current that does not
fluctuate periodically with time.
Default Value
A pre programmed value to be used if you fail to set your
own.
DHCP
Dynamic Host Configuration Protocol
A protocol used to automatically acquire parameters
required for the communication, such as IP address.
The sender of IP address is called a DHCP server, and
the receiver is called a DHCP client.
DIMM
Dual-in-line memory module.
Disk
A spinning platter of magnetic data storage media. If the
platter is very stiff it is a hard drive, if it is highly flexible
it is a floppy disk, if it is a floppy disk in a hard housing
with a shutter it is commonly called a diskette.
Disk Drive
The hardware which spins the disk and has the heads
and control circuitry for reading and writing the data
on the disk.
Diskette
A floppy disk in a hard housing with a shutter.
DMA
Direct Memory Access. Special circuitry for memory
to memory transfers of data which do not require
CPU action.
DMI
Desktop Management Interface. A standard that
provides PC management applications with a common
method of locally or remotely querying and configuring
PC computer systems, hardware and software compo-
nents, and peripherals.
DNS
Domain Name System
A function to control the association between the IP
address and the name assigned to the computer.
If you do not know the IP address but if you know the
computer name, you can still communicate to that
computer.
Driver
A computer program which converts application and
operating system commands to external devices into the
exact form required by a specific brand and model of
device in order to produce the desired results from that
particular equipment.
DVMT
Dynamic Video Memory Technology
A video memory architecture that increases the
efficiency of the motherboard by using innovative
memory utilization and direct AGP.
ECP
Extended Capability Port. A set of standards for high
speed data communication and interconnection
between electronic devices.
Encryption Key (Network Key)
Data encryption key used to encrypt message text and
for computing message integrity checks. Data encryp-
tion protects data from unauthorized viewing.
This device uses the same encryption key to encode and
decode the data, and the identical encryption key is
required between the sender and receiver.
ESD
Electro-Static Discharge. The sudden discharge of elec-
tricity from a static charge which has built-up slowly.
Example: the shock you get from a doorknob on a dry
day or the sparks you get from brushing hair on a dry
day.
Extended Memory
All memory more than the 640KB recognized as system
memory.
FCC
Federal Communication Commission.
Floppy Disk
A spinning platter of magnetic data storage media which
is highly flexible.
GB
Gigabyte.
Hard drive
A spinning platter of magnetic data storage media where
the platter is very stiff.
clio.book Page 76 Friday, June 2, 2006 10:37 AM