A web hosting company must upgrade its older, unsupported on-premises servers. The company wants a cloud solution in which the cloud provider is responsible for: - Server patching - Application…

Hybrid cloud refers to a mix of on-premises, private, and public cloud services, which describes an architecture, not a specific service model with defined responsibilities.

Infrastructure as a Service (IaaS) provides virtualized computing resources (servers, storage, networking) where the customer is responsible for operating systems, applications, data, middleware, and runtime, which does not meet the requirement for the provider to handle server patching and application maintenance.

Software as a Service (SaaS) is a cloud model where the cloud provider manages all layers, including applications, data, runtime, middleware, operating systems, virtualization, servers, storage, and networking. This means the provider is responsible for server patching, application maintenance, data center security, and disaster recovery, aligning perfectly with the requirements.

Platform as a Service (PaaS) provides a platform for developing, running, and managing applications without managing the underlying infrastructure, but the customer typically manages the application and data, so application maintenance is often a customer responsibility.