Learn why separate VLANs need Layer 3 routing, how router-on-a-stick connects them, and how trunk settings control VLAN traffic.
Intermediate12 min read
Ethernet and Switching lessonNetworkingPractice
UNTIMED COACHING
Practice before the pressure
Use feedback to correct the model, not merely memorize an option position.
GUIDED PRACTICE
Practice the lesson questions
Answer normal lesson questions without a timer. Every answer includes an explanation, and incorrect answers can be tried again before continuing.
20 questions balanced across the lesson's key topics
At least four explanatory diagrams or tables
Retry freely, without a timer or score
CONCEPT MODELS
See the lesson as a system
Use these visual guides to connect the key ideas before answering the questions.
Inter-VLAN Routing PathSeparate VLANs use a trunk to reach router subinterfaces for Layer 3 forwarding.Trunk Eligibility ChecksA VLAN crosses a trunk only when it is available and permitted on that port.Native VLAN AgreementThe native VLAN identifies untagged trunk traffic and must have matching settings at both ends.