Difference Between Pure Aloha and Slotted Aloha

I want to know about the Difference between Pure Aloha and Slotted Aloha so please can you give me the distance between these two parts and also give me the website that can help me in this topic?

[Shaleen]

As you want know about Difference between Pure Aloha and Slotted Aloha so below I am providing you some basic information about Pure Aloha and Slotted Aloha.

Pure Aloha
Pure Aloha protocol. Boxes indicate frames. Shaded boxes indicate frames which have collided. the first step implies that Pure Aloha does not check whether the channel is busy before transmitting. The critical aspect is the "later" concept: the quality of the back off scheme chosen significantly influences the efficiency of the protocol, the ultimate channel capacity, and the predictability of its behavior.

Slotted Aloha
In the idealized slotted aloha model that we are considering here, time is slotted and all packets are of equal length. Packet transmission time is one full slot. Packets are transmitted in the next slot after they arrive. We also assume that there is no buffering, i.e., it is never the case that a station has more than one packet to transmit in a single slot.