Wow, what a great TCP deep dive! You nailed the three-way handshake and sliding window explanations. I love how you broke down congestion control—Slow Start and Congestion Avoidance make so much sense now. The IP packet and TCP segment visuals really help too. It’s cool to see how TCP keeps data reliable yet fast. The Nagle’s Algorithm and Delayed Acknowledgment clash was eye-opening. That deadlock scenario clicked for me. Line of Head Blocking’s impact on HTTP requests was a solid example too. This ties everything together so well. Can’t wait for more in your series!