I’ve talked about cloud computing before in these pages. It’s a model of networking that in some ways brings us back to the monolithic data center, but in other ways makes that data center distributed, rather than central. A data cloud, an application cloud, a services cloud. An everything cloud, and, indeed, when one reads about cloud computing one sees a load of “[X]aaS” acronyms, the “aaS” part meaning “as a service”: Software as a Service (SaaS), Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and so on.