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Glossary
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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.
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.
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.
RADIUS client
RADIUS (Remote Authentication Dial-in User Service)
is an authentication and accounting protocol managing
network access, and a RADIUS client is a party that
accesses the network.
In Internet connecting service, a Network Access Server
(NAS) such as that for dial-up and broadband access
server is a RADIUS client. In a wireless LAN system, a
wireless LAN access point is a RADIUS client.
Saturation
The degree to which the color is pure.
Secondary DNS Server
Subsidiary DNS server used when a primary DNS server
cannot be used.
Shared secret
A character string to be used for mutual authentication
between RADIUS server and RADIUS client.
Sharpness
The degree to which the boundary of two portions is
clearly distinguished.
SMTP server
A server for sending or relaying e-mail messages
between servers.
SNMP
A protocol for monitoring and managing network
devices.
SolidPTZ
Function that diminishes or crops an image to adjust the
image position and ratio.
SSL
Abbreviation for Secure Sockets Layer. This is a
protocol developed by Netscape Communications
Corporation to be used for communications of encrypted
data on the Internet.