Learn by doing
Your networking lab.
Choose a topic, open a lab, or continue with lessons and videos.
Explore networking topics
Learn key ideas, then check them with a short quiz.
DNS Resolver
Follow a lookup, explore the cache, and take a quiz.
Open lab →Subnetting
Change the prefix and see how host ranges and bits change.
Open lab →OSI Model
Explore the seven layers, take a quiz, and arrange them in order.
Open lab →
Ports & protocols cheat sheetCommon ports, TCP/UDP, OSI layers, and protocols without ports.
Lessons →Networking foundations, addressing, and services.
Video lessons →Watch Behailu's lessons in Amharic. Internet connection needed for video.
Learning path →Follow the topics in a practical order.
About the lab →See the topics covered by Behailu's IT Lab.
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Open it from your home screen like an app.
In Safari, tap Share, then Add to Home Screen. Turn on Open as Web App if shown, and tap Add.