A company wants to deploy an application in a public cloud. Which of the following service models gives the MOST responsibility to the provider?

SaaS stands for Software as a Service, which is a cloud service model that gives the most

responsibility to the provider. In SaaS, the provider delivers the entire software application to the

customer over the internet, without requiring any installation, configuration, or maintenance on the

customer’s side. The customer only needs a web browser or a thin client to access the software,

which is hosted and managed by the provider. The provider is responsible for the security,

availability, performance, and updates of the software, as well as the underlying infrastructure,

platform, and middleware. The customer has no control over the software, except for some limited

customization and configuration options. The customer pays for the software usage, usually on a

subscription or pay-per-use basis.

SaaS is different from other service models, such as PaaS, IaaS, or BPaaS. PaaS stands for Platform as

a Service, which is a cloud service model that provides the customer with a platform to develop, run,

and manage applications without worrying about the infrastructure. The provider is responsible for

the infrastructure, operating system, middleware, and runtime environment, while the customer is

responsible for the application code, data, and configuration. IaaS stands for Infrastructure as a

Service, which is a cloud service model that provides the customer with the basic computing

resources, such as servers, storage, network, and virtualization. The provider is responsible for the

physical infrastructure, while the customer is responsible for the operating system, middleware,

runtime, application, and data. BPaaS stands for Business Process as a Service, which is a cloud

service model that provides the customer with a complete business process, such as payroll,

accounting, or human resources. The provider is responsible for the software, platform, and

infrastructure that support the business process, while the customer is responsible for the input and

output of the process. Reference: Cloud Service Models - CompTIA Cloud Essentials+ (CLO-002) Cert

Guide, What is SaaS? Software as a service explained | InfoWorld, What is SaaS? Software as a

Service Explained - Salesforce.com, What is SaaS? Software as a Service Definition - AWS