Why are slots used in DQDB?

Slots in Distributed Queue Dual Bus (DQDB) are used to manage access to the shared communication medium efficiently. By dividing time into slots, DQDB allows for orderly transmission of data, reducing the chances of collisions and ensuring fair access for all nodes on the network. This time-division method also helps to prioritize data transmission based on the needs of the nodes, facilitating a more organized and predictable network flow.