Cloud Service Models Lecture

Introduction

• Presenter: Adam
• Course: Fundamentals
• Episode: 5
• Topic: Cloud Service Models
  • Differences and key characteristics

Session Objectives

• Understand the concepts of Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
• Compare and contrast these cloud service models.
• Grasp the roles of infrastructure, platform, and software.

Exercise Scenario

• Imagine a startup hosting its own application:
  • Purchase Servers: Hardware to run applications.
  • Networking Infrastructure: Necessary for internet connectivity.
  • Storage Infrastructure: For server data storage.
  • Virtualization Software: To efficiently utilize hardware and separate environments.
  • Operating Systems: Required for running virtual machines.
  • Middleware: Additional software for system and application operation.
  • Runtime: Hosts the application (e.g., IIS or Docker).
  • Application and Data: Final layers hosted.

Service Model Layers

1. Infrastructure
   • Hardware and virtualization.
2. Platform
   • Operating system, middleware, runtime.
3. Software
   • Application and data.

Cloud Service Models

• On-Premises

  • Ownership of all layers is on the user.
  • Cloud provider not involved.

• Infrastructure as a Service (IaaS)

  • Cloud provider manages infrastructure.
  • User manages platform and software.
  • Use cases: Migration, testing, development, disaster recovery.
  • Examples: Virtual machines, virtual networks.

• Platform as a Service (PaaS)

  • Cloud provider manages infrastructure and platform.
  • User builds and manages own applications.
  • Use cases: Cloud app development, AI, machine learning.
  • Examples: SQL databases, app services, logic apps.

• Software as a Service (SaaS)

  • Cloud provider manages everything.
  • User only utilizes applications.
  • Examples: Outlook, Skype, OneDrive.

Responsibilities by Model

• IaaS: Provider manages data center, networks, servers.
• PaaS: Provider manages OS and development tools.
• SaaS: Provider manages applications and data.

Conclusion

• Visit Adam's website for study guides and practice tests.
• Engage with the episode by subscribing and commenting.
• Follow for the next episode through playlists or channel links.