What Is a Distributed System?
Before you can answer this question, I like to step back and take a good look at the history of computing. Mainframes and legacy client-server applications were monolithic—all the processing took place on a single set of hardware. As hardware grew cheaper, and especially after widespread hardware virtualization came to fruition, these trends gave way to the widespread development of distributed systems. I began to see this trend during my time as an architect at a large cable and telecom provider.