In today’s cloud-first world, designing infrastructure that is both secure and cost-efficient is a top priority for any organization building on AWS. Whether you're launching a startup, modernizing legacy systems, or scaling enterprise workloads, getting the architecture right from the start is critical.

The basic lego unit is the 1x1. It’s the smallest block, connects to any other piece and hurts a lot when you step on it with bare feet.

In AWS, the equivalent of the 1x1 is a Virtual Machine (VM). And yes, a lot of the “managed” services like RDS, ELB, and EMR are abstracted to provide the convenience of the service without managing the underlying infrastructure but behind the scenes, they all use virtual machines.