Day 1- System Design Interview: What happens when you type a URL?

In this first episode, we break down the most famous engineering interview question of all time: "What happens when you type a URL into your browser and hit Enter?"

This isn't just a networking question; it is the foundation of High-Level Design (HLD). Understanding the journey of a request allows us to understand every component of a scalable system—from the browser cache to the load balancer, and deep into the database layer.

Whether you are preparing for a tech interview at Google, Meta, or Amazon, or just want to understand how the internet actually works, this video covers the end-to-end architecture.

📌 In this video, we cover:

The Browser & OS: Parsing the URL, HSTS, and checking local caches.

DNS Resolution: How the domain name is converted to an IP address (Recursive vs. Iterative).

Networking Protocols: The TCP/IP 3-Way Handshake and SSL/TLS encryption (HTTPS).

Traffic Management: How Load Balancers distribute traffic.

The Backend: Web Servers vs. Application Servers.

Data Layer: Fetching data from Databases and Distributed Caches.

👨‍💻 Course Roadmap: This series will cover HLD, LLD, Scalability, Consistent Hashing, Database Sharding, and real-world architecture case studies. Make sure to Subscribe and hit the bell icon so you don't miss Day 2!