> For the complete documentation index, see [llms.txt](https://docs.arkannis.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arkannis.net/cloud/azure/courses/az900-course/cloud-models-and-cloud-types/overview-of-cloud-models.md).

# Overview of Cloud Models

## Infrastructure-as-a-Service (IaaS)

* Virtual Machine, networking, loadbalancers, firewalls
* Pieces of hardware that are virtualized in the cloud

## Platform-as-a-Service (PaaS)

* Upload code packages and have them run, without access to the hardware
* You're not managing the RAM, CPU, Disk space.
* Basically "Hey here is my program, please run it"

## Software-as-a-Service (SaaS)

* Access to configuration only
* Think webapps such as Dropbox, Google Drive, Office 365

## Shared Responsibility Model

![](/files/vZn9tiHZMK3RVV6Q9r4H)

#### Always your Responsibility:

* Information and data
* Devices (PC and Mobile)
* Accounts and identities