I took JSP Utilization 1 first to learn in the wild type. In that class, the explanation was so good that I could understand the overall flow and basic principles. However, I thought I needed to know the basics a little more to fully understand, so after taking the http class, I moved on to the mvc class. I am grateful that you explained the past technologies step by step and in such detail. I think I will be able to learn the principles that I didn't know in detail in JSP Utilization 1. And, I always keep in mind what you always say, "You have to know why the technology came out." I think the point of pointing out the problem and telling me what technology came out as a solution to the problem is so good. I thought I would never be able to become close to studying in my life, but after meeting Younghan Teacher, studying every day is so much fun these days. I know you must have been busy with work and had a hard time finding time, but I am so grateful that you uploaded so many informative lectures and became the first step in my challenge.