You know what a cloud is; you know there are three kinds of clouds, Infrastructure as a Service (IaaS); Platform as a Service (PaaS); and Software as a Service (SaaS); so what the heck is this public, private and hybrid cloud stuff?
It’s actually pretty simple. No matter what kind of cloud you have, the servers it runs on have to live somewhere. A public cloud runs on servers at a third party’s data-center. A private one runs on your servers at your data center. And, a hybrid runs its services on on both public and private clouds.