CCNA Trunking Quiz: Do you know what happens here?
Native VLAN mismatches are one of Cisco's favorite switching traps. Drop your answer in the comments!
The question
Switch 1 sets native VLAN 10 on a trunk, Switch 2 sets VLAN 20. What is the main risk?
The answer
A Traffic silently leaks between VLANs
Untagged frames from VLAN 10 cross the wire and get dumped right into VLAN 20. CDP logs an error, but it won't kill the port. Follow for tomorrow's rep.
Exam tip
Read what the question is actually asking before looking at the options. The wrong answers here are ones candidates genuinely pick — each is true of something adjacent, just not of what was asked.