Independent practice

Labs

Hands-on scenarios you can run on their own — no course required. Pick a topic, then work through its scenarios one at a time.

Packet Forwarding

Trace how a device decides where to send a packet next, hop by hop, across a few common setups.

Practice picking subnet masks and reading addresses quickly, the way you would on the job.

Work through how address translation lets private networks share public addresses — and what breaks it.

Segment a switched network into VLANs, carry them over trunks, and route between them.

Learn how ACLs evaluate traffic in order, and where small mistakes quietly break a rule.

See how a host turns an unknown IP into a MAC address — one subnet check and one request/reply exchange at a time.

Follow a name lookup from record types through the full resolution chain to common failures.