Draw any system design diagram with multiple backend servers, and you'll need something in front of them.

That something is almost always Nginx.

Nginx powers some of the highest-traffic websites in the world. The reason is simple: Nginx is exceptionally good at handling massive concurrent connections while consuming minimal resources.

This chapter gives you the depth to disucss Nginx confidently in interviews. We'll cover Nginx's architecture, load balancing strategies, caching, SSL termination, rate limiting, and high availability patterns, along with the reasoning you need to explain your choices.

1. When to Choose Nginx