How Do URLs Work?
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You might look at URLs nearly every day, but what do all the parts of a Web address actually do? TunnelBear message: TunnelBear is the easy-to-use VPN app for mobile and desktop. Visit tunnelbear.com to try it free and save 10% when you sign up for unlimited TunnelBear data. Techquickie Merch Store: designbyhumans.com Techquickie Movie Poster: shop.crowdmade.com Leave a comment with your requests for future episodes, or tweet them here: twitter.com Follow: twitter.com Join the community: linustechtips.com Image at 1:35 credit Matthaus Wander. Used with permission under Creative Commons Attribution 2.5 Generic. creativecommons.org
A web address, or URL, is more than just a string of characters you type into a browser. It is composed of several distinct parts that work together to locate and fetch content on the internet. The first piece is the scheme, such as HTTP, which dictates how the browser should communicate with the remote server. Other schemes like mailto, FTP, and IRC show that URLs can also trigger email clients, file transfers, or chat connections. Following the scheme is the domain name, the human friendly address of a site, and at the end a top level domain or TLD such as .com, .org, or .net that groups sites into broad categories or country based identifiers. The path after the domain specifies the exact file or page on the site, with each slash representing another level of folders, similar to how you organize files on a computer drive. Additional components may appear after a question mark or a hash sign, encoding user queries, browser details, and page fragments, which guide the server to perform a specific search, or to jump to a particular section of a page respectively. Some URLs also include little known features like domain hacks using country codes to shorten links, or an internationalized domain name that uses non Latin characters converted into a compatible ASCII form understood by DNS. Overall, understanding these building blocks helps demystify why a URL looks the way it does and how browsers turn a simple address into a loaded webpage.
Topics · computer networks · internet technology · web technology · science and technology
Questions answered
- What is a URL and what are its main parts?
- A URL consists of a scheme (such as HTTP), a domain name with a possible top level domain (like example.com), and a path that locates the exact page. It may also include a query string after a question mark and a fragment after a hash sign to indicate a page section.
- What is a top level domain (TLD) and what does it indicate?
- A top level domain is the last part of a domain name, like .com, .org, or .net, which helps categorize or indicate country associations and also aids in routing and DNS organization.
- Why are percent-encoded characters used in URLs?
- Percent encoding converts special characters into a format that can be safely transmitted in URLs, ensuring characters like spaces or symbols are correctly interpreted by servers and browsers.