What are the four types of swaps?

Can you elaborate on the four distinct types of swaps that are commonly utilized in the world of finance and cryptocurrency? Each type holds its own unique characteristics and purposes, so understanding their differences is crucial for anyone navigating this complex landscape. Are these swaps categorized based on the assets they involve, the parties involved, or perhaps the nature of the risk they are designed to mitigate? Clarifying the specifics of these four types would greatly benefit those seeking to expand their knowledge in this area.