Today cloud computing has matured and has clear demarcations between the different classes of service—platform, software, and infrastructure. Microsoft offers services in all three categories. But before we jump into them, let us first understand the nuances involved in cloud services. In this chapter, we will understand how Infrastructure as a Service (IaaS) works. Think of IaaS as a pizza where your favorite pizza vendor provides the frozen pizza and you need to manage the stuff that is used to warm and serve the pizza. In the IaaS world, this usually means that the vendor provides all the hardware, including the computing power, network, and storage along with its associated services. All you do is use the combination of the infrastructure offerings, which allows you to deploy any application or service on that platform.