They explain concepts that can be difficult from the very basics, as easily and understandably as possible. After finishing these lectures, I even want to take the next network lecture right away! It's quite satisfying to learn the things I just vaguely passed over one by one! - After Completion Even though the topics get harder, they are taught really easily. To the point where there's no need for repetition! Because it was easy to understand in the lecture, I really enjoyed completing it. I'll take a short break and then go register for the next level lecture right away! I sincerely thank you for creating such a lecture. I had despaired about my brain because it was too difficult to understand even after looking at several books😭😭