225R5906112 /15 UDX
Default Gateway
A router that serves as an entry point into and exit point out of a network. For example, a local network (LAN)
may need a gateway to connect it to a wide area network (WAN) or to the Internet.
DHCP
Dynamic host configuration protocol. DHCP is a communications protocol that lets network administrators
manage centrally and automate the assignment of IP addresses in an organization's network. Using the
Internet Protocol, each machine that can connect to the Internet needs a unique IP address. When an
organization sets up its computer users with a connection to the Internet, an IP address must be assigned to
each machine. Without DHCP, the IP address must be entered manually at each computer and, if computers
move to another location in another part of the network, a new IP address must be entered. DHCP lets a
network administrator supervise and distribute IP addresses from a central point and automatically sends a
new IP address when a computer is plugged into a different place in the network.
DMX
DMX-512 Lighting protocol over RS-485 interface. Carries information of 512 channels from a lighting
controller to lighting devices. Standardized by USITT.
HD
Hazard Distance (HD) is the distance measured from the projection lens at which the intensity or the energy
per surface unit becomes lower than the applicable exposure limit on the cornea or on the skin. The light beam
is considered (to be) unsafe for exposure if the distance from a person to the light source is less than the HD.
IP
Internet Protocol. The network layer of TCP/IP. Required for communication with the internet.
Latency
The total time from the first pixel is coming in on an input source, until the first light representing that pixel is
visible on the screen. This includes the transport delay. The value is normally given in milliseconds.
MAC address
Media Access Control address. Unique hardware number, used in combination with the IP-address to connect
to the network (LAN or WAN).
Glossary
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