Infrastructure-as-a-Service (IaaS) is a delivery model that enables organizations to outsource the purchase, setup, and most ongoing administration of core infrastructure. It is also the foundational layer of cloud computing. Software-as-a-Service (SaaS) and Platform-as-a-Service (PaaS) solutions are built upon this infrastructure. Because the IaaS layer is so critical to the overall performance and success of a comprehensive cloud solution, it is important to fully understand the benefits and costs associated with the various private cloud delivery models. To that end, this paper will provide an introduction to the various options and demonstrate the total cost of ownership (TCO) advantage associated with hosted private clouds. A GoGrid Whitepaper