Collisions occur on a network when simultaneous data transmissions collide with one another when trying to access network resources within a collision domain. Network switches create collision domains within the network and prevent collisions within that domain using Carrier-sense multiple access with collision detection.
A collision is the situation that occurs when two or more demands are made simultaneously on equipment that can handle only one at any given instant. It may refer to:
Collision domain, a physical network segment where data packets can "collide"
Carrier-sense multiple access with collision avoidance, (CSMA/CA) used for example with wireless LANs
Carrier-sense multiple access with collision detection, (CSMA/CD) used with Ethernet
Late collision, a specific type of collision that should not occur on properly operating networks
Local collision is a collision that occurs in the network interface rather than on the network itself