What is CSMA/CD and how does it work?

Carrier Sense Multiple Access / Collision Detection abbreviated as CSMA/CD, is known as a set of rules that determines how a network devices tends to respond when devices attempt to use data channel simultaneously. It tends to work by detecting a collision in the medium and backing off as necessary. Consider a LAN with several hosts. When one of them transmits a frame, it tends to listens on medium in order to check whether medium is busy.