Which of the following is NOT a service
model in cloud computing?
a. Software as a Service (SaaS)
b. Hardware as a Service (HaaS)
c. Platform as a Service (PaaS)
d. Infrastructure as a Service (IaaS)
The correct answer and explanation is:
The correct answer is b. Hardware as a Service (HaaS).
Explanation:
Cloud computing offers several models to deliver different services over the internet. The main service models in cloud computing are Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). However, Hardware as a Service (HaaS) is not a recognized or widely used service model in cloud computing.
Here’s a breakdown of the main cloud service models:
- Software as a Service (SaaS):
- SaaS delivers software applications over the internet. Instead of installing software on individual devices, users can access applications through a web browser.
- Examples of SaaS include services like Google Workspace, Microsoft 365, Dropbox, and Salesforce. These platforms offer business solutions without users having to manage underlying infrastructure or platforms.
- Platform as a Service (PaaS):
- PaaS provides a platform that allows developers to build, deploy, and manage applications without worrying about the underlying infrastructure.
- PaaS platforms typically include operating systems, databases, and development tools. Examples include Google App Engine, Microsoft Azure, and Heroku. This model simplifies application development by abstracting away much of the complexity of infrastructure management.
- Infrastructure as a Service (IaaS):
- IaaS offers virtualized computing resources over the internet, such as virtual machines, storage, and networking. This model allows businesses to rent IT infrastructure on a pay-as-you-go basis, without needing to purchase and manage physical hardware.
- Examples of IaaS include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform.
Hardware as a Service (HaaS), on the other hand, is not a standard cloud service model. While hardware can be rented or leased for physical infrastructure (e.g., through managed hosting providers), it is not part of the core cloud computing service models that typically focus on abstracted, virtualized services like SaaS, PaaS, and IaaS.
In summary, HaaS is not part of the commonly recognized cloud computing models, while SaaS, PaaS, and IaaS represent the primary ways in which cloud services are delivered.