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Glossary
100Base-TX
A UTP cable consisting of 4 pairs of
two wires (8 conductors) each,
twisted together into a single,
unshielded set (i.e., the cable is not
enclosed in a metallic mesh to block
electromagnetic noise). This is
referred to as a twisted pair cable, and
100Base-TX cables meet the
Category 5 specifications for such
cables.
A cable of this type is capable of
carrying unmodulated signal data at
the rate of 100 megabits per second
over distances of up to 100 meters
(with a 100 Mbps base band system).
It is used for connection to local area
networks using fast Ethernet, which
operate at speeds in excess of 10
Mbps (data transfer at the rate of 10
megabits per second).
10Base-T
A UTP cable consisting of 4 pairs of
two wires (8 conductors) each,
twisted together into a single,
unshielded set (i.e., the cable is not
enclosed in a metallic mesh for
blocking electromagnetic noise).
Also referred to as a twisted pair
cable, it is commonly used for
connection in Ethernet-based local
area networks.
A cable of this type is capable of
carrying unmodulated signal data at
the rate of 10 megabits per second
over distances of up to 100 meters
(with the 10 Mbps base band system).
Client computer
A computer that is connected to a
server in a network environment, and
which receives service from a server.
DHCP (Dynamic Host
Configuration Protocol)
A protocol (an established set of
means and procedures for conducting
data communication) for
dynamically assigning IP addresses.
A DHCP server provides an IP
address to client computers when
they are started up. It is also capable
of providing client computers with
information such as gateway
addresses, domain names, and subnet
masks.
DHCP server
A server that uses DHCP protocol (an
established set of means and
procedures for conducting data
communication) to dynamically
provide client computers with TCP/
IP configuration information upon
startup.
DNS (Domain Name System)
A distributed database system (i.e., a
database in which another server
continues providing information if
trouble causes a particular server to
go down) for managing information
such as IP addresses and host names.
Capable of identifying devices from
host names or objects from URLs
(Uniform Resources Locator: a
system used for specifying the
locations of files and other resources
on the Internet and intranets) even
when corresponding IP addresses are
not known. (Example: http://
www.fsv.sony.co.jp) Also capable of
finding IP addresses from host
names.
DNS (primary) server
The DNS server that has primary
responsibility for handling inquiries
from clients and other DNS servers.
DNS (secondary) server
An alternate DNS server that is used
when the primary DNS server goes
down or is very slow to respond due
to heavy load.
Default gateway
With TCP/IP networks, a device that
serves as a bridge for data
communication between two
networks, or between devices that are
not located within the same network.
Ordinarily, this is the IP address of a
router.
Disk capacity
The measure of space available for
saving programs and files.
Domain name
The name that indicates a network
consisting of hosts that are connected
to the internet and the servers at the
heart of that network. As with IP
addresses, domain names must not be
duplicated. A domain name is
delimited by commas, and ordinarily
the elements are given in order of
decreasing scope from the right. For
example: With "fsv.sony.co.jp",
"fsv" indicates the host (a computer),
"sony" designates the Sony network,
"co" indicates a company or
commercial business, and "jp"
indicates Japan. In other words,
"fsv.sony.co.jp" indicates the
computer fsv belonging to the
company Sony in Japan.
Encrypted password
A password that is encrypted for
transmission over a network, so that
it cannot be read by any third party.
File system
A system for recording information
used when reading or writing files,
such as the storage location, the date,
and the owner.
HTTPD (Hypertext Transfer
Protocol Daemon)
Software that runs in the background
(works without user intervention) to
provide web server functions. HTTP
is a protocol by which a Web server
sends test and graphics, and the D is
an abbreviation for Daemon,
indicating that the object is software.
Host name
A unique name assigned to a device
(such as a computer) connected to a
TCP/IP network. Also referred to as a
machine name or PC name.
54
Glossary
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