What is SaaS, PaaS and Iaas?
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Service Models Examples
Infrastructure as a Service (IaaS): As the name suggests, it provides computing infrastructure and other resources such as virtual-machines, block or file-based storage, load balancers, IP addresses, virtual networks etc.
Example: Azure virtual machines, Amazon EC2, Rackspace.
Platform as a Service (PaaS): As the name suggests, it provides you computing platforms which typically includes operating system, programming language execution environment, database, web server etc.
Example: AWS Elastic Beanstalk, Windows Azure, Heroku etc.
Software as a Service (SaaS): Provides on-demand software and there is no need to worry about installation and setup of the application.
Example: Microsoft office 365, salesforce.com
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