IaaS is a form of cloud computing that provides virtualized resources, such as virtual machines, containers, networking services such as firewalls, and other computing resources. Companies or individuals can use these services via the Internet and setup their whole infrastructure over the cloud. This benefits small, mid-sized, and even large companies, as they can avoid hardware costs and pay for only the services they use. The IaaS platform provides high availability and scalability, and can be managed through the cloud portal. For example, to create a virtual machine (VM), you can log in with your cloud account, choose an option to create a new VM by selecting an operating system (for example, Windows or Linux), and then choose any of the pre-built images for the version you want to install. Within minutes, the VM becomes ready, and you can use that VM to install any of the tools and host your applications. The premier IaaS providers are Microsoft Azure, Amazon Web Services, Google Compute Engine, IBM SmartCloud Enterprise, and Rackspace Open Cloud. Some examples of the IaaS model are VM, Storage, and networks.