Which cloud service model fully manages the application and handles ongoing maintenance?

The cloud service model that fully manages the application and handles ongoing maintenance is Software as a Service (SaaS). In this model, service providers deliver fully functional applications to end-users over the internet. Users can access these applications from anywhere without needing to install or maintain any software on their own devices. The provider takes care of all aspects of application management, including updates, security, and infrastructure, allowing users to focus solely on utilizing the software for their business needs.

This model simplifies the user experience significantly, as it removes the burden of managing backend services, hardware, and maintenance tasks, which are all handled by the service provider. Users of SaaS typically pay a subscription fee for access to the software, which is hosted and maintained on the provider's servers.

In contrast, other cloud service models like Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) offer varying levels of management and maintenance responsibilities to the users. With IaaS, users are responsible for managing typically higher levels of infrastructure components such as networking, servers, and storage. PaaS provides a platform for developers to build, deploy, and manage applications, but it still requires them to handle aspects of their applications and environments.

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