Ever wonder what really happens when you open a website? These lessons cover the building blocks of the web, browsers, web pages, servers, URLs, and HTTP and HTTPS, in friendly, everyday language. They're the foundation for understanding almost everything else online.
What Is the Web?
URLs, HTTP, and domain names, the basics of how the web works.
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How Web Pages Work
What really happens when you open a website.
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What Is a Browser?
The app that shows you web pages, like Chrome or Safari.
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🧪 Interactive
What Is a Search Engine?
A service that helps you find information on the internet, fast.
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🧪 Interactive
What Is a URL?
The address that points to a page on the web.
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What Is a Hyperlink?
A clickable link that takes you to another page, file, or resource.
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What Is DNS?
The internet's address book: it finds a site by its name.
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What Is HTTP?
The language browsers and servers use to talk.
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What Is HTTPS?
The secure version of HTTP that keeps your connection private.
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What Is HTML?
The building blocks that hold a web page together.
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What Is CSS?
The styles that make a web page look good.
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What Is JavaScript?
The code that makes a web page interactive.
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What Is an API?
How apps ask each other for information.
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What Is a Server?
The computer that stores and sends things when other computers ask.
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What Is a Web Server?
The computer that stores websites and sends pages to your browser.
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What Is Web Hosting?
The home for your website on the internet.
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What Is a Database?
Where apps and websites store and organize information.
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What Is an IP Address?
The number that finds a computer on the internet.
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What Are Cookies?
Little notes a website saves so it can remember you.
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What's the Difference Between an App and a Website?
An app is a program you install on a device; a website is a page you visit in a web browser.
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What's the Difference Between HTTP and HTTPS?
HTTP lets a browser and website talk but isn't protected; HTTPS is the safer version that protects the information.
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What's the Difference Between a Web Browser and a Search Engine?
A web browser is the app that opens websites; a search engine is a tool that helps you find them.
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How Do Email Attachments Work?
An attachment is a file sent along with an email; your device opens it with the right app when you tap it.
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How Do Online Ads Work?
Online ads are messages on sites and apps that want you to act; clicking one sends your device to follow the ad's link.
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How Do Browser Extensions Work?
A browser extension is a little add-on that gives your browser a new ability, using permissions you grant it.
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