Quick quiz for all you Cloud aficionados out there: what’s missing from the NIST definition of Cloud Computing? To make this challenge easy for you, here’s the definition: “Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.”

Give up? What’s missing is any mention of data centers. Sure, today’s Clouds typically consist of resources in data centers, running one way or another on racks full of physical servers. But there’s nothing in the definition of Cloud that specifies anything about the physical location of Cloud resources.

Look at the NIST definition again. If you’ve seen this definition before, you may notice a new word that NIST presumably added after their …