A$($n$)\_\_\_\_\_\_\_\_\_\_\_\_\_$ solution makes all of the computing hardware resources available, and the customers, in turn, are responsible for installing and managing the systems, which they can normally do$,$ for the most part, over the Internet.

infrastructure as a service $($IaaS$)$

platform as a Service $($PaaS$)$

software as a service $($SaaS$)$

identification as a service $($IDaaS$)$