Amazon EC2
Elastic Compute Cloud — resizable virtual servers in the cloud (IaaS).
Amazon EC2 (Elastic Compute Cloud) is AWS’s core Infrastructure-as-a-Service compute offering. It provisions virtual machines — called instances — letting you choose the CPU, memory, storage, and networking profile for your workload. Because EC2 exposes the full operating system, you are responsible for patching, configuring, and securing the OS and everything running on it, the defining IaaS trait under the shared-responsibility model. For the CLF-C02 exam, contrast EC2 with managed services: AWS Lambda abstracts the server entirely (no OS access, billed per invocation), and Amazon RDS manages the database engine. EC2 means maximum control with maximum management responsibility.
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