CompTIA Cloud+ Practice Test

Which service model allows for the highest level of control over applications and infrastructure?

1. IaaS

2. PaaS

3. SaaS

4. FaaS

The correct answer is: IaaS

The Infrastructure as a Service (IaaS) model provides customers with the highest level of control over both the applications and infrastructure. In this model, users have access to virtualized computing resources over the internet, which includes servers, storage, and networking. Organizations can install and configure their operating systems, middleware, and applications, allowing for extensive customization and control to meet specific needs. With IaaS, businesses can manage the entire infrastructure stack, from the networking components to the virtual machines and their configurations. This level of control enables companies to implement and modify security measures, optimize performance, and efficiently handle resource allocation according to their requirements. As such, IaaS is particularly beneficial for organizations that need to maintain certain compliance standards or possess unique operational needs that standard environments can't fulfill. In contrast, the other service models such as Platform as a Service (PaaS) and Software as a Service (SaaS) provide higher levels of abstraction, which means less direct control over the underlying infrastructure. PaaS allows developers to create applications without managing the underlying servers or storage, and SaaS offers software applications managed entirely by providers, limiting customization and control. Function as a Service (FaaS) also abstracts away infrastructure, focusing primarily on running