Which cloud service model requires the least amount of administration responsibility from the client's perspective?

The cloud service model that requires the least amount of administration responsibility from the client’s perspective is Software as a Service (SaaS). In this model, the service provider manages all aspects of the software application, including its maintenance, updates, security, and infrastructure. Clients can access the software via the internet, eliminating the need for them to handle installations, server management, or software patching.

This means that users can focus on utilizing the application to meet their business needs without worrying about the underlying technical details. SaaS solutions are commonly used for applications like email, customer relationship management (CRM), and collaboration tools, allowing organizations to quickly adopt and use these services with minimal operational overhead.

In contrast, Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) require more administrative involvement. With IaaS, clients need to manage their operating systems, applications, and data, while PaaS entails responsibilities related to application development and management, including middleware and runtime environments. Disaster Recovery as a Service (DRaaS), while providing a managed recovery option, also requires some level of client involvement in terms of planning and configuring the recovery processes.

Thus, the correct answer is SaaS, as it represents the cloud service