Here's a comprehensive list of all the topics covered in Course 2:

1. Security
   - Cross-site Scripting (XSS)
   - iFrame Protection
   - Security Headers
   - Secure Communication (HTTPs)
   - Dependency Security
   - Compliance & Regulation
   - Input Validation and Sanitization
   - Server-Side Request Forgery (SSRF)
   - Server-side JavaScript Injection (SSJI)
   - Feature Policy | Permissions-Policy
   - Subresource Integrity (SRI)
   - Cross-Origin Resource Sharing (CORS)
   - Cross-Site Request Forgery (CSRF)

2. Networking
   - How the Web Works
   - Communication Protocols
   - REST APIs
   - GraphQL
   - gRPC

3. Testing
   - Unit & Integration Testing
   - E2E and Automation Testing
   - A/B Testing
   - Performance Testing
   - Test-Driven Development Overview
   - Security Testing

4. Communication
   - Short Polling
   - Long Polling
   - Web Sockets
   - Server Side Events
   - WebHooks

5. Database & Caching
   - Local Storage
   - Session Storage
   - Cookie Storage
   - Indexed DB
   - Normalization
   - HTTP Caching
   - Service Working Caching
   - API Caching
   - State Management

6. Logging & Monitoring
   - Telemetry
   - Alerting
   - Fixing

7. Performance
   - Performance Monitoring
   - Performance Tools
   - Network Optimization
   - Rendering Pattern

8. Accessibility
   - Keyboard Accessibility
   - Screen Reader
   - Focus Management
   - Color Contrast

9. Low Level Design
   - Component Design
   - Config driven UI
   - Shimmer UI
   - Routing & Protected Routes
   - Multi Language Support
   - Infinite Scroll
   - Accordion
   - Reddit Nested Comments
   - Pagination
   - Autocomplete & Search Bar

10. High Level Design
    - HLD - Photo Sharing App (Instagram)
    - HLD - Social Media Feed (Facebook, Twitter)
    - HLD - E-commerce App (Amazon, Flipkart)
    - HLD - Video Streaming (Netflix, HotStar)
    - HLD - Google Docs
    - HLD - Google Sheets
    - HLD - Diagram Tools (Excalidraw)
    - HLD - Music Streaming (Spotify)
    - HLD - Live Commentary (CricInfo, Crickbuzz)
    - HLD - Cab Services (Uber, Ola)
    - HLD - Analytics Dashboard (Google Analytics)

11. Bonus Masterclass
    - Salary Negotiation Masterclass
    - Resume Masterclass
    - Personal Branding Masterclass
    - LinkedIn Masterclass

12. Bonus Interview Questions
    - Security Interview Questions
    - Communication Protocol Interview Questions
    - Database & Caching Interview Questions
    - Logging & Monitoring Interview Questions
    - Networking Interview Questions

13. Offline Support
    - Progressive Web Applications (PWAs)
    - Service Workers

These topics cover a wide range of concepts relevant to modern full-stack development, ensuring a comprehensive understanding of both frontend and backend aspects, as well as other critical skills like testing, security, performance optimization, and design.