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Glossary
ActiveX control
A component program object that can be used with web
pages or other application programs. The technology for
creating ActiveX control is part of software developed
by Microsoft.
ARP commands
The commands for checking the entry of the IP address
and MAC address in a host computer, or for updating
them.
Bandwidth control
To limit the amount of transmitted data.
Bit rate
The rate at which data bits are transmitted.
Capture
To display the audio and video digital data from the
video equipment on a computer.
Codec
Software/hardware for coding/decoding video and audio
data.
Contrast
The difference in tone between the lightest and darkest
portions of the image.
Default gateway
Device that can be used to access the other network.
DHCP server
Abbreviation for Dynamic Host Configuration Protocol
server. The IP address of a terminal without an
individual IP address can be automatically distributed by
the Dynamic Host Configuration Protocol (DHCP). The
DHCP server assigns the IP addresses to the terminals.
Digital zoom
Zooming in/out function of an image without using an
optical zooming function.
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.
I-picture interval
The interval between I-pictures in Moving Picture
Experts Group (MPEG). I-picture means the decoding
picture without using the other picture's information.
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.