Why is there data collision in bus network?

Data collision in a bus network occurs when multiple devices attempt to transmit data simultaneously over the same communication channel. Since the bus network shares a single communication line, overlapping signals can interfere with each other, leading to corrupted data. This situation is typically managed by using protocols like Carrier Sense Multiple Access with Collision Detection (CSMA/CD), which helps devices sense the channel's status before transmitting. If a collision is detected, the devices will wait for a random time before attempting to retransmit, minimizing future collisions.