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.
While an infrastructure can, in theory, have any number of tiers, by far the most common pattern is the 3-tier architecture.
This article describes:
The three-tier architecture pattern has been an established best practice for decades. By separating infrastructure into layers, each is inherently more secure and flexible. In the cloud, the same design principles apply. This article focuses on the core principles of the three-tier web application architecture pattern on AWS, including availability zones, load balancers, route tables, gateways, autoscaling groups, and databases.
