How it works
Each lesson is a short read with examples, then a few practice questions. Some ask you to type an answer (a number, an address, what a piece of code prints), some have you pick one, and some have you tap steps or lines into the right order. You can try again as often as you like; after two misses there’s a button to show the answer.
What do I need to know first?
How networks work, and ideally the subnetting course, since routes are written as prefixes like 10.1.0.0/16.
The other networking courses
- How networks work: 7 lessons
- IP addressing and subnetting: 7 lessons
- DNS, HTTP and other protocols: 7 lessons
Where is my progress saved? In this browser, like the rest of the site. Nothing to sign up for.