• Cloud is the abbreviation for cloud computing and stands for storage, computing power, or software products that can be used even though they are not available on the local computer.
• Cloud computing is the on-demand delivery of IT resources over the Internet with pay-as-you-go pricing.

Cloud Service Provider (CSP)

• Amazon Web Services (AWS): AWS All-in-one
• Google Cloud Platform (GCP)
• Microsoft Azure

Types of Cloud

Cloud-based deployment (Public)

• owner is the CSP
• Run all parts of the application in the cloud
• Migrate existing applications to the cloud
• Design and build new applications in the cloud

On-premises deployment (Private cloud deployment)

• owner is the company
• Deploy resources by using virtualization and resource management tools
• Increase resource utilization by using application management and virtualization technologies

Hybrid deployment

• = public + private: owner is the company
• Connect cloud-based resources to on-premises infrastructure
• Integrate cloud-based resources with legacy IT applications

Types of Cloud service models

• Infrastructure as a Service (IaaS)
• Platform as a Service (PaaS)
• Software as a Service (SaaS)
  • e.g. Dropbox

Advantages of cloud computing

• Pay as you go
• Trade upfront expense for variable expense
  • Not having to invest in technology resources before using them
• Benefit from massive economies of scale
  • The aggregated cloud usage from a large number of customers results in lower pay-as-you-go prices
• Stop guessing capacity
  • Accessing services on-demand helps to prevent excess or limited capacity
• Increase speed and agility
• Realize cost savings
• Go global in minutes