## IaaS IaaS, or Infrastructure as a Service, provides virtualized computing resources over the internet, a crucial component when compared to alternatives like PaaS (Platform as a Service) and SaaS (Software as a Service), as it offers more control and flexibility over the underlying infrastructure. Although not directly related to Django (a high-level Python Web framework) or React.js (a JavaScript library for building user interfaces), IaaS serves as the foundation upon which the servers and other infrastructure supporting these applications are built and deployed. Ultimately, IaaS is a critical piece in the larger puzzle of web development, enabling developers to manage and scale infrastructure in response to their application needs, without the capital expense and complexity of managing physical servers. Use IaaS when you need the most control over your infrastructure and are willing to take on the responsibility of managing it. This includes setting up and managing servers, networking resources, storage, and other fundamental computing resources. IaaS is like getting a barebones computer over the internet. It's up to you to set up everything, but you can customize it to your exact needs. If you need to have a very specific setup for your SaaS app, IaaS might be the way to go. **Example:** [[Amazon EC2 (Elastic Compute Cloud)]]