Your employer asks for your help choosing a cloud service model. Your employer would like to manage virtual machines, operating systems, data, and security, but would not like to maintain data center infrastructure.Which cloud service model should you suggest?

Infrastructure as a Service $($laaS$)$

Software as a Service $($SaaS$)$

Platform as a Service $($Paas$)$

Identity as a Service $($IDaaS$)$