While studying for an interview for employment, I felt that I lacked knowledge related to networks, so I took the course. Since there were many things to do, from coding tests to self-introductions, it was very burdensome to prepare for networks by reading books again, but I was attracted to the fact that I could learn only the network knowledge necessary for developers in just 3 hours. When I took the course myself, I liked that it was not superficial like an introductory course, but was not too in-depth either. In particular, when I opened the packet and listened to the explanation, the knowledge I had vaguely known became concrete and I understood it clearly. The lecture content is mainly composed of questions that are frequently asked in interviews, so when I am asked questions related to networks, I can confidently answer them, and it is helpful for my colleagues who are studying for interviews with me to ask good questions in interviews. Also, since the lecturer has experience at a large company like Samsung, I really liked the fact that he included examples of how it is used in actual work during the lecture. If you are preparing for employment or are about to join a company, I think this is a good course to recall the network knowledge you learned in your major.