AXIS COMMUNICATIONS

<Product Name> Quick User’s Guide

AXIS 2120 User’s Manual

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ActiveX - A control (or set of rules) used by a browser.
ActiveX controls are often downloaded and installed
automatically as required.
ARP - Address Resolution Protocol. A protocol for
assigning an IP address to a physical device address that is
recognized in the local network. The ARP command can be
used to set the IP-address for your product.
ARTPEC - Axis Real Time Picture Encoder - used for image
compression.
BOOTP - A protocol that can automatically configure a
network device (give it an IP address).
Bps - Bits per second. A unit for measuring speeds in
networks. A LAN might run at 10Mbps or 100Mbps.
CGI - Common Gateway Interface. A set of rules (or a
program) that allows a Web Server to communicate with
other programs.
DSL - Digital Subscriber Line. A means of transferring data
via standard phone lines.
Ethernet - A widely used networking standard.
ETRAX - Axis' own microprocessor.
Firewall - A virtual barrier between a LAN (Local Area
Network) and other networks, e.g. the Internet.
Frame Grabber card - Plug-in hardware for "grabbing"
images
FTP - File Transfer Protocol. Used for simple transfer of
files to and from an ftp-server.
HTML - Hypertext Mark-up Language. Used widely for
authoring documents viewed in web browsers.
HTTP - Hypertext Transfer Protocol. The set of rules for
exchanging files (text, images, sound, video, and other
files) on the World Wide Web.
Intranet - A private network limited to an organisation or
corporation. Usually closed to external traffic.
IP - Internet-Protocol. See TCP/IP.
IP number (address) - A unique number used by a computer
on the network to allow it to be identified and found.
JPEG - A standard image format, used widely for
photographs. Also known as JPG.
LAN - A local area network (LAN) is a group of computers
and associated devices that typically share common
resources within a limited geographical area.
Linux - A popular operating system, that is “open source”
and practiclly free of charge.
Lux - A standard unit for light measurement.
NWAY - A network protocol that automatically negotiates the
highest possible common transmission speed between two
devices.
Null Modem Cable - A cable used for connecting a PC to a serial
device, using the modem protocol for communication.
PING - A small utility used for sending data packets to n e twork
resources to check that they are working and that the network is
intact.
PPP - Point-to-Point Protocol. A method allowing one computer
to connect to another, usually via a modem over a phone line.
Pre/post alarm image - The images from immediately before and
after an alarm.
Protocol - A special set of rules governing how two entities will
communicate. Protocols are found at many levels of
communication, and there are hardware protocols and software
protocols.
SMTP - A common e-mail protocol.
TCP/IP - Transmission Control Protocol/Internet Protocol. A suite
of network protocols that determine how data is transmitted.
TCP/IP is used on many networks, including the Internet. TCP
keeps track of the individual packets of informatio n and and IP
contains the rules for how the packets are actually sent and
received.
URL - Uniform Resource Locator. An "address" on the network.
V.90 - An operating standard for telephone modems.
WAN - Wide-Area-Network. Similar to a LAN, but on a larger
geographical scale.
Web server - A program on a computer that delivers the
resources (usually web pages) requested by the web user (the
client).
Wizard - A program designed specifically to guide the user
through a procedure. Typically used for installations and
configurations.
Glossary of Terms