A group of Ethernet or Fast Ethernetdevices in a CSMA/CDLAN that are connected by repeaters and compete for access on the network. Only one device in the collision domain may transmit at any one time, and the other devices in the domain listen to the network in order to avoid data collisions.
A collision domain is sometimes referred to as an Ethernet segment.
Collision Domains A white paper from Transition Networks, Inc. (pdf)
