AWS EC2 (Amazon Elastic Compute Cloud) is a core service of AWS that provides resizable virtual servers in the cloud. Essentially, it allows you to run applications on virtual machines without buying physical hardware.
A Cloud refers to computing services that are delivered over the internet instead of using local computers or on-premises servers. Essentially, it allows you to store, process, and access data or applications remotely on shared hardware managed by a cloud provider.
Shared Responsibility means AWS secures the cloud infrastructure, while you secure your data, applications, and configurations within that cloud.
Cloud computing is important because it makes IT more flexible, scalable, cost-effective, secure, and accessible globally.
A Virtual Machine (VM) is essentially a software-based emulation of a physical computer. It behaves like a real computer with its own CPU, memory, storage, and network interface, but it runs on top of a physical machine using a hypervisor.