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Glossary
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DNS server
Abbreviation for Domain Name System server. As an IP
address required for connecting to the device on an IP
network is numerical and difficult to remember, the
Domain Name System was established. A domain name
is alphabetic and is easier to remember. When a client
computer uses a domain name to connect to another
computer, it asks a DNS server to translate the name into
the corresponding IP address. Then the client computer
can obtain the IP address of the computer to be
connected.
Frame rate
The number of frames of a moving image that can be
transmitted per a second.
FTP client
Software to be used for accessing the FTP server.
FTP server
A server to be used to transfer files via a network.
HTTP port
A port used to communicate between the web server and
the web client such as a web browser.
IP address
Abbreviation for Internet Protocol Address. An
individual IP address is basically assigned to each piece
of equipment connected to the Internet.
Java applet
A program written in Java language that can be used in
the web browser.
Java Virtual Machine
Software that transfers the Java applet's byte code to the
native code of your system to execute it.
JPEG
Abbreviation for Joint Photographic Expert Group. The
still image compression technology or standards of the
ISO (International Organization for Standardization)
and ITU-T. Popularly used as image compression format
on the Internet, etc.
MAC address
A network address that uniquely identifies each LAN
card.
MPEG4
Abbreviation for Moving Picture Experts Group4. One
of the MPEG standards for image compression format
aiming to transmit images at a high compression rate
with lower picture quality.
Multicast
The class D IP address assigned between 224.0.0.0 and
239.255.255.255. Using this IP address enables you to
transmit the same data to multiple equipment.
Network address
The portion that identifies the local network (subnet) in
an IP address.
Network bandwidth
Bit rate that can be used for networking.
NTP server
Network time server that transmits and receives time
information over the networks.
Passive mode
The mode whereby a client FTP allows TCP connection
for data transmission to the FTP server.
PoE
Technology to supply the electric power with LAN
cable.
POP server
A server for storing incoming e-mail until you have read
it.
Primary DNS server
One of the DNS servers that can first reply to a request
by connected devices or other DNS servers.
Proxy server
A server or software that acts as an intermediary
between a local network and the Internet so that it can
connect to the Internet in place of a computer on a local
network
Saturation
The degree to which the color is pure.
Secondary DNS Server
Subsidiary DNS server used when a primary DNS server
cannot be used.