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HTTP (Hypertext Transfer Protocol) is the language that web browsers and web servers speak to each other. Request a web page or download a file or watch a video, it is HTTP that makes it possible. A Web address is also called a URI (Uniform Resource Identifier) From a web user’s view, a URL is just a piece of text that you put into your web browser that tells it which page to go. The browser has to extract the hostname from the URI, look it up to find the IP Address, and then connect to the right port number.