Infrastructure: Server, Network, Storage, virtualization
e.g. Google compute engine, AWS ec2
PaaS Platform as a service
Platform: O/S, web server , database (programming language execution environment)
used by developer, only need to manage software and data
e.g. Google app engine, windows azure, AWS beanstalk
FaaS Fuction as a service, e.g. AWS lamba
provides a platform allowing customers to develop, run, and manage application functionalities without the complexity of building and maintaining the infrastructure
Building an application following this model is one way of achieving a "serverless" architecture, and is typically used when building microservices applications.
SaaS Software as a service
Software: application
used by end user, No need to install any software on PC
e.g. Google apps, gmail, google doc, windows 365, sales force
Cloud Providers: aws, google cloud, icloud,
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