What's the diffrence between IaaS and PaaS
I don't understand the difference between Infrastructure as a Service (IaaS) and Platform as a Service (PaaS). Is IaaS renting a dedicated server while PaaS is renting a Virtual Machine? Is IaaS unmanned hosting while PaaS is managed hosting? The book lists EC2 as an example of PaaS, but EC2 is really just renting a virtual server with some pre-configurations. Is there a clear technical line between IaaS and PaaS or the difference just the providers marketing?