System Design Fundamentals - Latency, Throughput, Availability, Consistency, Redundancy, Replication, and Congestion Exp

When people first step into system design, they often expect to learn about architectures—microservices, databases, load balancers, and scaling strategies. But very quickly, something becomes clear. The real language of system design is not architecture diagrams. It is a set of fundamental forces —concepts that quietly govern how systems behave under load, failure, and growth. These forces exist whether you acknowledge them or not, and every architectural decision is ultimately an attempt to bal