VLANs and trunks
Separate networks on shared switches, carry them between switches, and find VLAN mistakes in configs and patching.
- Level
- Intermediate
- Length
- About 50 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Explain access ports, trunk ports, tagging and the native VLAN
- Find a VLAN mismatch in a switch configuration
- Identify an incorrect patch connection from a patch map
- Choose the correct check when a device lands on the wrong network
Course outline
- 1.VLANs and trunks: keeping traffic in its laneVideo · 2 min
- 2.Access ports, trunks and tagsLesson · 16 min
- 3.Tracing a VLAN end to endLesson · 16 min
- 4.Inter-VLAN routing and VLAN hygieneLesson · 15 min
- 5.VLANs and trunks: knowledge checkKnowledge check · 18 questions
- 6.Printers stop working after a switch changeScenario
- 7.Final exam5 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- IEEE 802.1Q: Bridges and Bridged Networks (VLAN tagging)
- Access/trunk port configuration concepts (vendor-neutral)
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