Cisco · hands-on lab
CCNA Subnetting Challenge
Seven subnetting and addressing problems against the clock — no equipment needed.
- 30 minutesTime in the lab
- IntermediateLevel
- 8 tasksChecked automatically
- CertificateVerifiable link when you finish
The situation
A branch office network is being designed. Work out the numbers the network engineer needs. Use a pen and paper — no subnet calculators!
What you will do
- Usable hostsquestion
- Network addressquestion
- Broadcast addressquestion
- Dotted maskquestion
- Right-size the subnetquestion
- Private addressingquestion
- IPv6 shorthandquestion
- Your assigned host (unique to you)question
How it works
The lab opens in your browser: a real terminal or desktop, nothing to install. Work through the tasks, press Check after each one and the portal verifies your work. Stuck? Ask for a hint. Finish every task and you get a certificate page with its own verification link for LinkedIn or your CV.