Which cloud service model focuses on delivering backend services like authentication?

The correct answer is focused on Backend as a Service (BaaS), which specifically caters to providing various backend functionalities to developers and applications. BaaS typically includes services such as data storage, user authentication, push notifications, and server-side logic, which allow developers to focus more on front-end development without having to manage server infrastructure.

BaaS enables faster mobile and web application development by handling all the backend processes, making it easier for developers to implement features like user authentication without building everything from scratch. This approach is particularly beneficial as it streamlines the development process, offering ready-to-use backend services that can integrate seamlessly with applications.

Other options like Platform as a Service (PaaS) and Software as a Service (SaaS) have different focuses; PaaS is more about providing a platform that includes the infrastructure and development tools needed to create applications, while SaaS delivers software applications over the internet on a subscription basis. Infrastructure as a Service (IaaS) focuses on providing virtualized computing resources over the internet. Each of these models serves distinct purposes within the cloud computing ecosystem, but BaaS uniquely emphasizes backend services like authentication.