Amazon Elastic Compute Cloud

Amazon Elastic Compute Cloud
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* Cloud Service Models: There are three primary cloud service models, which are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS)1.
* Amazon EC2: Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It allows users to run virtual servers and manage storage, security, and networking1.
* IaaS Definition: IaaS provides virtualized computing resources over the internet. In an IaaS model, a cloud provider hosts the infrastructure components traditionally present in an on-premises data center, including servers, storage, and networking hardware1.
* EC2 as IaaS: Amazon EC2 falls under the IaaS category because it provides the hardware infrastructure, allows users to scale computing capacity up or down, and users pay only for the capacity they use1.
* Exclusion of Other Models: EC2 is not PaaS because it does not provide a platform for developing, running, or managing applications. It's not SaaS as it doesn't deliver software over the internet. DaaS, or Desktop as a Service, provides virtual desktops, which is not the service EC2 offers1.
References:
* AWS's official documentation on Amazon EC21.