In the Infrastructure as a Service (IaaS) model, the cloud provider delivers the basic infrastructure components such as virtual machines, storage, and networking resources. However, the customer is responsible for managing the operating system, applications, and any software configurations that run on the infrastructure. This gives the customer more control over the environment while still benefiting from the cloud provider's hardware and scalability.

The provider manages the operating system, runtime, and infrastructure, and the customer is only responsible for managing the applications. NaaS focuses on network services, not the management of operating systems and applications. The provider manages everything, including the operating system and applications, and the customer simply uses the software.