Backend development is used in almost the same way as server development. HTTP = How you should put it in front of your browser (HTTPPS; a more secure request method) Address to show html, css file = URL or API Guide users to a specific address based on address = Router The process of creating a server is to associate a domain with an authorized IP address (deploy the server). That's all I've organized. I don't know if it went well.I'll try my best!