(ISC)2 Certified in Cybersecurity Practice Exam

Which common cloud service model offers the customer the most control of the cloud environment?

1. Lunch as a service (LaaS)

2. Infrastructure as a service (IaaS)

3. Platform as a service (PaaS)

4. Software as a service (SaaS)

The correct answer is: Infrastructure as a service (IaaS)

Infrastructure as a Service (IaaS) offers customers the most control over their cloud environment compared to the other cloud service models. In IaaS, users are provided with fundamental computing resources such as virtual machines, storage, and networks, which allows them to manage and configure the infrastructure according to their specific needs. This level of control enables customers to install and run operating systems, applications, and middleware on the virtual infrastructure, leading to a highly customizable environment. IaaS differs significantly from Platform as a Service (PaaS) and Software as a Service (SaaS), where the level of control is considerably reduced. PaaS provides a platform for developers to build, test, and deploy applications without needing to manage the underlying infrastructure, which limits the level of access and control users have over both the environment and the tools available. Similarly, SaaS delivers fully functional software applications to users, handled entirely by the service provider, meaning customers have no control over the infrastructure or the underlying software architecture. Indeed, despite Lunch as a Service (LaaS) being a playful term not commonly recognized in formal cloud service categorization, IaaS stands out by granting a broad range of management capabilities, making it the model that offers the most