As a non-major, I thought I needed to acquire a certain level of network knowledge while studying development. There were also a few cases where I was asked about related knowledge when I was interviewed at a relatively large company. So I bought a book and read it, but the book was so extensive that it was hard to figure out whether I needed to know all of this knowledge or which parts I needed to know the most. This lecture was 3 hours long, but it was good because it covered all the essential content. The lecture materials were also very high quality, so I was able to review them while listening to the lecture, create expected interview questions, and write my own answers. The lecture time is short, but it is compressed with important content, so I think it is much more useful than just reading a book. I recommend this lecture to those who are starting to study development or job seekers because it can help them build a basic foundation for networks and the web to some extent.