What will you
understand today?
Start with how the internet works. Every topic has three levels.
01Names & addresses
What is DNS?
How a name you can remember becomes an address a computer can use.
3 explanation levels02Names & addressesWhat is a domain name?
The readable names behind the places you visit online.
3 explanation levels03Names & addressesWhat is an IP address?
How devices address data—and why an address is not an identity.
3 explanation levels04Speed & performanceWhat is caching?
Why keeping a useful copy can make the web feel faster.
3 explanation levels05Requests & responsesWhat is HTTP?
The requests and responses behind loading a page, fetching a picture, and sending a form.
3 explanation levels06Security & privacyWhat is HTTPS?
How HTTPS protects a web connection, and why a secure connection does not prove a website is trustworthy.
3 explanation levelsNo topic found yet.
Try a topic name, a shorter question, or one of these starting points.
Follow the connections between topics, then choose the depth that works for you.