Infrastructure-as-a-Service (IaaS) is the true foundation for cloud computing, and what most people think about when they hear “cloud”: vast resource pools in globe-spanning data center environments, shared and consumed on-demand by companies of all sizes. Today, the lines between public and private clouds have blurred when it comes to infrastructure. Many providers offer highly secure closed-loop environments that resemble a private cloud, but with the multi-tenancy (sharing some resource pool elements with others) and elasticity of the public cloud. Other providers offer a more open consumption model, where you consume resources on-demand in the provider’s environment on a simple pay-as-you-go model. Today, many organizations create a hybrid cloud – where workloads are distributed across both a public and private tier for execution to attain the best of both worlds.