A VLAN is not a subnet
A layer-2 tag decides who may hear whom; a layer-3 prefix decides who is a neighbour. Confusing them produces perfect silence.
20 minutesTechnical content last reviewed on 21 Sept 2026
This lesson is for signed-in learners
Create an account to subscribe and record your learning progress.
What this lesson builds
- Configuring the network so it survives a reboot
- Deciding whether a destination is a neighbour