Which of the following statements is incorrect in relation to multiple access protocols: pure aloha algorithm lets users transmit whenever they have data to be sent, and allows for collisions to happen; if a frame was destroyed, then the sender just waits a random amount of time and sends it again slotted aloha system divides time into discrete intervals called slots, each interval corresponding to one frame protocols in which stations listen for a carrier (i. e. a transmission) and act accordingly are called carrier sense protocols the token ring protocol allows for collisions to happen, and next addresses the collisions