The Three Fundamental Cloud Computing Models are:

• Infrastructure as a Service (IaaS)
• Platform as a Service (PaaS)
• Software as a Service (SaaS)

Each model represents a different level of control, responsibility, and flexibility for organizations adopting modern technological solutions. Below is an explanation of each model, including examples, customer responsibilities, and key advantages:

This cloud service model provides virtualized IT infrastructure resources over the internet, including servers, storage, and networking. It’s ideal for organizations seeking flexibility without investing in physical hardware. Commonly used by infrastructure architects.

• Examples: Microsoft Azure, Amazon EC2
• Customer Responsibility: Operating system, applications, data, configurations
• Advantages: Scalability, pay-as-you-go pricing, full control over the environment

This model offers a complete environment for developing, running, and managing applications without worrying about the underlying infrastructure. It includes servers, storage, networking, operating systems, and middleware. Ideal for developers.

• Examples: Azure App Services, AWS Elastic Beanstalk
• Customer Responsibility: Application development and management only
• Advantages: Accelerates development, reduces operational complexity