📥 FREE DOWNLOAD: Ultimate AWS Cheat Sheet Get access to my hand-picked summary of 129+ AWS services to speed up your learning: 👉 📺 ABOUT THIS VIDEO Are you preparing for a high-stakes interview in Cloud Computing, DevOps, SRE, or Solution Architecture? Most candidates struggle when the interviewer moves from basic definitions to scenario-based networking questions. Understanding how data moves across the internet is the difference between a "Junior" and a "Senior" engineer. In this video, we move beyond textbook definitions. I break down the 13 Essential Network Protocols that power the modern internet. We will visualize exactly where they fit in the OSI model (Layer 3, 4, and 7) and how to explain them effectively in your next interview. By the end of this tutorial, you will understand not just what these protocols are, but why we use them in real-world system design. ⏱️ TIMESTAMPS & TOPICS Layer 3: The Network Layer (Routing & Addressing) How data travels from Source A to Destination B. 03:16 - IP (Internet Protocol): IPv4 vs IPv6 & logical addressing explained. 04:26 - IPSec: How we secure "tunnels" for VPNs and Hybrid Cloud connections. 05:44 - ICMP: Why ping works and how we use it for diagnostics. Layer 4: The Transport Layer (Reliability & Speed) How we ensure data arrives correctly. 07:40 - TCP: The backbone of reliable web traffic (Flow control, Congestion control). 09:47 - UDP: Why Zoom and Online Gaming skip reliability for speed. 11:02 - QUIC: How modern internet combines UDP speed with TCP reliability (HTTP/3). Layer 7: The Application Layer (User Interaction) Where your code and the user meet. 13:11 - DNS: The "Phonebook" of the internet. 15:04 - HTTP vs HTTPS: Port 80 vs 443 & the importance of TLS encryption. 16:32 - WebSocket: Enabling real-time communication (Chats, Stock tickers). 17:53 - SSH: Securely managing remote servers without passwords. 20:11 - OAuth 2.0: The Authorization framework (What access do you have?). 20:11 - OIDC: The Authentication protocol (Who are you?). 🔗 CONNECT & LEARN MORE 👨‍💻 Join the "IT k Funde" Community: Get exclusive guidance, roadmap access, and direct support: 📩 Weekly Tech Newsletter: Stay ahead of market trends with my free weekly breakdown: 👋 Let's Connect: For doubts, mentorship, or just to say hi: #SystemDesign #NetworkProtocols #DevOpsCareer #CloudComputing #TechInterviews #SoftwareEngineering #ITkFunde #CareerGrowth #NetworkingBasics