The services provided by cloud computing are divided into three levels:

The services provided by cloud computing are usually divided into the following three levels: 1. Infrastructure as a Service (IaaS), the lowest layer of cloud computing services, provides virtualized infrastructure resources; 2. Platform as a Service Service "PaaS" is further abstracted on the basis of IaaS, providing a platform for application development and deployment; 3. Software as a Service "SaaS", the top layer of cloud computing services, provides users with fully managed applications.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

The services provided by cloud computing are usually divided into the following three levels: Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS).

1. Infrastructure as a Service (IaaS): This is the lowest layer of cloud computing services, providing virtualized infrastructure resources such as virtual machines, storage and networks. IaaS provides a higher level of control and autonomy at the user level. Users can expand and configure resources as needed, and manage operating systems, middleware, applications, etc. by themselves.

2. Platform as a Service (PaaS): The PaaS layer further abstracts IaaS and provides a platform for application development and deployment. Users can use the tools and environment provided by PaaS to develop, test and deploy applications without paying attention to the underlying infrastructure. The PaaS layer typically includes components such as operating systems, development tools, databases, and web servers.

3. Software as a Service (SaaS): SaaS is the top layer of cloud computing services that provides users with fully managed applications. Users can directly access and use various application software through web browsers or mobile applications without having to manage the underlying infrastructure and platform. Common SaaS services include email, online office suites, customer relationship management and other applications.

These three levels constitute the overall architecture of cloud computing services, providing different levels of abstraction and management, allowing users to choose appropriate service levels according to their own needs and use cloud computing flexibly. resource.

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