Cloud providers such as Microsoft, Amazon, Google and others offer cloud services through their data centers to their customers via thin clients and other existing legacy apps. Cloud customers don’t need to have servers installed on-premises and can just sign up with the provider to get all the services alternatively from the provider’s servers in their data centers located globally. Majority of these cloud services can be grouped into three service models: Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). These are primarily the basic build blocks of cloud computing and all granular services, offered by the cloud providers, are mapped to one of these models. As an example if you are using Google Docs, which is part of G Suite, you are utilizing the Software as a Service (SaaS) model. All the Cloud services are subscription based where you pay a monthly fee depending on the service and usage of that particular service. This is completely different than the traditional model of paying for software licenses and services upfront.
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