I am currently working for an information security company, so I wanted to take related training, and I applied for and took this course. The result is very satisfactory. The instructor's expertise is evident throughout the lecture. The more I listened to the lecture, the more ashamed I felt of myself for having only done superficial diagnoses. I didn't know what kind of attacks to perform in what kind of environment, but through this training, I was able to clearly understand what attacks to perform depending on the environment. Also, it seems that the instructor created the attack process himself, and I think it will be really helpful in practical diagnosis. There are many times when I have to attack, but I just stare blankly at the parameters and don't know what to do, but if I refer to this, I think I can smoothly perform the diagnosis sequentially. Oh, and that roadmap is amazing. I printed it out. I've only watched it once now, but I'm going to watch it two more times as the instructor said. Thank you, instructor.