Cloud Computing — Cloud Service Models

Cloud services are generally categorized into three main models:

  1. IaaS (Infrastructure as a Service): Provides virtualized computing resources like servers, storage, and networking. Example: AWS EC2, Google Compute Engine.
  2. PaaS (Platform as a Service): Provides a platform for developers to build, test, and deploy applications without managing infrastructure. Example: Heroku, AWS Elastic Beanstalk.
  3. SaaS (Software as a Service): Delivers software applications over the internet. Users can access them through a web browser without installation. Example: Gmail, Zoom, Microsoft Office 365.

These models represent different levels of control and responsibility. IaaS offers the most flexibility, while SaaS is fully managed by the provider.

Example:
- IaaS: AWS EC2 for hosting a virtual machine.
- PaaS: Google App Engine for deploying an app.
- SaaS: Netflix for watching movies online.
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