Solution
Cloud services are typically categorized into three main types. Each type offers different levels of control, flexibility, and management.
Infrastructure as a Service (IaaS): Basic computing infrastructure (servers, storage, networking) on a pay-as-you-go basis. Users control operating systems, applications, and storage, but not the physical infrastructure. Examples: AWS virtual servers, Microsoft Azure, Google Compute Engine.
Platform as a Service (PaaS): A complete development and deployment environment, including infrastructure, middleware, tools, and management services. Developers focus on coding without managing hardware and software layers. Examples: Google App Engine, Azure App Services, Heroku.
Software as a Service (SaaS): Software applications hosted and managed by the provider. Users subscribe and use them over the internet, with no hardware management or software updates. Examples: Google Workspace (Gmail, Docs, Drive), Microsoft Office 365, Salesforce.
Key distinctions: IaaS rents infrastructure. PaaS rents a platform to build apps. SaaS rents ready-made applications. Control is highest with IaaS and lowest with SaaS; convenience is the reverse.