Infrastructure as a Service (IaaS) is a model in cloud computing — or the use of virtual servers on the Internet — where computer hardware is supplied and managed by an external provider for enterprise operations. 

It’s basically offered to companies that need computer infrastructure but don’t want to deal with the difficulties of managing it.

Think of the IaaS service as a store that sells pre-configured computer systems to people. Rather than shop for each part individually and set up your own computer, all you have to do is go to the store, pay for the set you like, and start using it right away when you get home.

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