A Bit History of Internet: "Chapter 5: Client-Server"
This is a short introduction to the difference between clients (such as your home PC of laptop running a web-browser) and servers (such as the computer which will host your website). Understanding the client-server relationship is important to understanding the relationship between HTML/CSS and other web technologies. It is also crucial a crucial concept to understand as you move towards going live with your example website.
Click https://en.wikibooks.org/wiki/A_Bit_History_of_Internet/Chapter_5_:_Client-Server link to open resource.