🏛️ System Design: The Complete Guide to Modern Architecture

Welcome to the definitive guide on designing scalable, reliable, and high-performance software systems.

---

📖 Front Matter

• Preface ....................................................................................... iv

---

📑 Table of Contents

Part 1: Core Concepts & Architectures

1. Foundations of System Design .............................................. 1 Functional & Non-Functional Requirements, Scalability, Consistency

2. How the Internet Works .................................................. 12 DNS, TCP/IP Stack, Protocol Internals

3. System Architectures ..................................................... 21 Monoliths, Microservices, and Migration Strategies

4. Architectural Patterns .................................................. 34 Layered, Event-Driven, Microkernel, and Modular Monoliths

5. Event-Driven Architecture Deep Dive .................... 42 Producers, Consumers, Brokers, Pub/Sub, and CQRS

6. Modern System Infrastructure Tools .................................. 53 Gateways, Container Orchestration, In-Memory Caches, and Event Streams

Part 2: Core Infrastructure & Deep Dives

7. Web Authentication Deep Dive ..................................... 65 Session-based Auth, JWTs, and Distributed Token Management

8. Reverse Proxy, Load Balancer, and API Gateway ............ 80 Forward vs Reverse Proxies, SSL Termination, & Gateway Patterns

9. Load Balancing Algorithms & Tools .................................................. 88 Round Robin, Consistent Hashing, Nginx, HAProxy, Envoy

Part 3: System Design Case Studies

10. URL Shortener System Design (Bitly) .................................. 95 High Read/Write Architectures, Base62 Encoding, Analytics Tracking

11. Real-time Stock Broker Application ........................................ 112 Order Matching Engines, WebSockets, Circuit Breakers, Financial Scale

---

🛠️ How this Book is Published

(Developer Note: Page numbers in the Table of Contents above are simulated for the GitHub preview.)

To convert this repository into a stunning, readable format, we can use an industry-standard static book generator. Some popular methods include:

1. mdBook: A highly popular command-line tool written in Rust (often used by official documentation). It rapidly converts Markdown files into a beautifully formatted, interactive static website that supports Mermaid diagrams and offline viewing out-of-the-box.
2. GitBook: A cloud-based platform that syncs directly with GitHub to turn markdown files into an aesthetically pleasing, searchable technical book.
3. Pandoc + LaTeX: For generating a classical, physical-grade PDF with dynamically generated hyperlinked tables of contents and actual page numbers.
4. Leanpub: For packaging your Markdown directly into ePub, PDF, and MOBI formats to sell on digital marketplaces.