I only understood the network operation mechanism, and although I had heard a lot about http, I lacked knowledge. After taking this lecture, I think I became a little more familiar with the concept of http. Also, I think it is an important lecture that allows me to indirectly feel the designers' difficulties while learning the protocol operation process. If I had studied http by heading to the bare ground and looking it up myself, it would have taken a long time, but thanks to the practical and condensed teaching by Yeonghan teacher, I feel like I saved a lot of time. Thank you for the great, high-quality lecture.