🚀 HTTP/1.1 vs HTTP/2 vs HTTP/3. If you aren't thinking about multiplexing and header compression, you're leaving performance on the table.

: Deeply explores TCP/UDP, HTTP (1.1, 2, and 3), gRPC, WebSockets, and how they impact application performance.

Understanding HTTP isn't just about knowing GET vs. POST . It’s about understanding the stateless nature of the web. A fundamental concept often covered in these courses is .

The final modules tie everything together by addressing performance optimization and infrastructure protection.

One process spins up multiple threads to handle concurrent requests (e.g., Tomcat). Threads share memory, making them lighter than processes, but they are still limited by OS overhead. Event-Driven, Non-Blocking I/O

For bidirectional, low-latency communication, standard HTTP polling often falls short. WebSockets provide persistent connections, while gRPC utilizes Protocol Buffers over HTTP/2 for lightning-fast microservice communication. 2. Database Engines and Storage

Using tools like Nginx, HAProxy, or Envoy to distribute incoming traffic, handle SSL termination, and shield internal microservices from the public internet. Why a Fundamentals-First Approach Wins