Fundamentals of Network Engineering

In modern software engineering, we heavily depend on libraries and frameworks to accelerate development. While these tools are invaluable for saving time, they can introduce leaky abstractions. This can lead to significant problems like performance degradation, unexpected errors, and excessive CPU, network, and disk usage. You might encounter hangs and high latency, making debugging incredibly challenging when the underlying mechanisms are unclear.

A strong understanding of network communication is crucial for backend engineering. The TCP/IP Internet suite forms the foundation of all backend interactions, connecting the frontend to the backend. Every protocol ultimately gets encapsulated into either a TCP segment or a UDP datagram. These packets are then wrapped in IP packets, encased in frames, and transmitted across the network.

For backend engineers aiming to optimize their systems, it's essential to grasp these layers, not just memorize definitions. Understanding what happens when a backend API receives an HTTP POST request, for example, reveals a complex process. This deeper understanding empowers engineers to:

• Improve backend API design
• Select the optimal protocol for specific tasks
• Tune protocols for maximum performance
• Ask insightful questions about frameworks and libraries to unlock their full potential

This course is designed for backend engineers building applications, services, or APIs who want to elevate their skills. Frontend engineers with an interest in backend development and some experience building backend apps will also benefit. Network engineers with a foundational understanding who want to effectively build backend applications can use this course to bridge the gap.

Note: This course is not intended for those preparing for network certification tests (CCNA, CCNP, CCIE, etc.). It focuses on practical application within a software development context.