Cloud Computing Fundamentals

Cloud computing is a model of delivering computing services over the internet
On-demand access to a shared pool of computing resources (e.g., servers, storage, applications)
Characteristics:
- On-demand self-service
- Broad network access
- Resource pooling
- Rapid elasticity
- Measured service

Infrastructure as a Service (IaaS)
- Provides virtualized computing resources (e.g., servers, storage)
- Examples: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP)
Platform as a Service (PaaS)
- Provides a complete development and deployment environment for applications
- Examples: Heroku, Google App Engine, AWS Elastic Beanstalk
Software as a Service (SaaS)
- Provides software applications over the internet
- Examples: Microsoft Office 365, Salesforce, Google Workspace

Public Cloud
- Owned and operated by a third-party provider
- Open to the general public
- Examples: AWS, Azure, GCP
Private Cloud
- Owned and operated by a single organization
- Not open to the general public
- Examples: corporate data centers, virtual private clouds
Hybrid Cloud
- Combines public and private cloud services
- Allows for data and application portability
- Examples: Microsoft Azure Stack, AWS Outposts

Security and Compliance
- Ensuring data protection and regulatory compliance
Data Sovereignty
- Ensuring data is stored and processed in accordance with local laws and regulations
Vendor Lock-in
- Difficulty in switching cloud providers due to proprietary technologies
Interoperability
- Ensuring seamless integration between cloud services and applications

Cloud computing delivers computing services over the internet via on-demand access to a shared pool of computing resources, such as servers, storage, and applications.
Key characteristics include on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service.

Infrastructure as a Service (IaaS): Provides virtualized computing resources, such as servers and storage, with examples including Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP).
Platform as a Service (PaaS): Offers a complete development and deployment environment for applications, with examples including Heroku, Google App Engine, and AWS Elastic Beanstalk.
Software as a Service (SaaS): Delivers software applications over the internet, with examples including Microsoft Office 365, Salesforce, and Google Workspace.

Public Cloud: Owned and operated by a third-party provider, open to the general public, with examples including AWS, Azure, and GCP.
Private Cloud: Owned and operated by a single organization, not open to the general public, with examples including corporate data centers and virtual private clouds.
Hybrid Cloud: Combines public and private cloud services, allowing for data and application portability, with examples including Microsoft Azure Stack and AWS Outposts.

Security and Compliance: Ensure data protection and regulatory compliance.
Data Sovereignty: Ensure data is stored and processed in accordance with local laws and regulations.
Vendor Lock-in: Difficulty in switching cloud providers due to proprietary technologies.
Interoperability: Ensure seamless integration between cloud services and applications.