Layered tired Architecture
The web tear is basically pulling information from the application. The application needs to be scalable as well as the servers etc.
Incremental – Linear
Could Computing – “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.”- Nist
Two costs, Opix, and copix.