1Cloud Concepts

• 1.1Cloud Concepts and Service Models

  Understand cloud computing basics, service models (IaaS/PaaS/SaaS), deployment models (public/private/hybrid), and how Microsoft 365 is a SaaS. The starting point for MS-900.

• 1.2Benefits of the Cloud and Pay-as-you-go

  Understand the benefits of the cloud—scalability, reliability, security, and cost (CapEx to OpEx)—and the pay-as-you-go model.