Art-Net Glossary

• ArtPoll: An Art-Net packet used to discover the existence of Art-Net nodes.
• ArtPollReply: An Art-Net packet sent by a Node in response to receipt of an ArtPoll.
• ArtDmx: The Art-Net packet used to transfer zero start code DMX512 packets over the network.
• Controller: A generic term describing an Art-Net device with the primary task of generating control data. For example, a lighting console (or e.g. TouchDesigner)
• Discovery: The process by which a controller discovers which nodes want to receive which universes of DMX512 data.
• Download: Art-Net specifies the direction of file transfer to be from a node to a controller during a download. That is, a controller would download a copy of a node’s configuration file in order to retrieve a local copy.
• Kiloverse: A group of 1024 Universes.
• Media Server: A generic term describing an Art-Net device capable of generating control data based on the ‘mx’ Media Extensions to Art-Net.
• Net: A group of 16 consecutive Sub-Nets or 256 consecutive Universes is referred to as a net. There are 128 Nets in total.
• Node: A device that is primarily designed to convert DMX512 to or from Art-Net. A Node supports up to 4 Input-Ports and 4 Output-Ports.
• OpCode: The 16-bit number which defines the packet type in Art-Net
• Port-Address: one of the 32,768 possible addresses to which a DMX frame can be directed. The Port-Address is a 15-bit number composed of Net+Sub-Net+Universe.
• Sub-Net: A group of 16 consecutive universes is referred to as a sub-net (not to be confused with the subnet mask).
• Subscription: The term used to describe a Node that is consuming a particular universe of DMX512 data
• Universe: A single DMX512 frame of 512 channels.
• Upload: Art-Net specifies the direction of file transfer to be from a controller to a node during an upload. That is, a controller would upload new firmware to a node.

This info has been taken from:
https://art-net.org.uk/how-it-works/introduction-and-terminology/#glossary