I'm in my second year of front-end development. It was really helpful that you explained the terms and usage used in actual work! And I think this will be helpful in interviews. In fact, among the interview questions, there was a question like "Why should login be implemented with POST? Why can't it be done with GET?" and the answer to that question was explained well with explanations, so I thought that if I had known in advance, I wouldn't have been nervous during the interview...ㅎㅎ And I think it was good that the TCP/IP part, which is a thick book at Kyobo Bookstore, was explained in a light and easy way, so it wasn't burdensome to approach! Even the letter example helped me understand it even more! If you're a non-major like me, want to organize the content quickly, or are a job seeker, I think it'll be helpful to listen to it without feeling burdened! : )