There are really no lectures related to servers, so I'm at a loss, and most of the game-related server books are sooooooooooooo old, so I was worried about how I would study, but after listening to this lecture, I feel at ease... I listened to the parts that were a little difficult to understand while googling them separately, but I'm scared of listening to the C++ server lecture, lol Anyway, there's no Korean language lecture as good as this one! Highly recommended!