It was excellent for understanding the overall flow of how networks operate, as you explained networks that I had only understood abstractly by breaking them down with a focus on protocols and network equipment. I had many impressions that it was a really well-written book while studying with "Learning Computer Architecture and Operating Systems on My Own," and the lecture is also really clean. I liked how you summarized and delivered only the key points, and how your voice was easy on the ears. As you mentioned at the beginning of the lecture, I'm planning to purchase the book as well. Thank you for uploading such a good lecture for free, and I look forward to your continued work.