Question:
How can you disable DTP on a switch port?
- Configure the switch port as a trunk. (no correct answer, in fact)
- Add an interface on the switch to a channel group.
- Change the operational mode to static access
- Change the administrative mode to access
Explanation: Although some books and websites said DTP is disabled if the switch port is configured as trunk or access mode (via the command “switchport mode trunk” or “switchport mode access”) but in fact DTP is still running in these modes. Please read at http://packetlife.net/blog/2008/sep/30/disabling-dynamic-trunking-protocol-dtp/. The only way to disable DTP on a switch port is to use the “switchport nonegotiate” command. But notice this command can only be used after configuring that switch port in “trunk” or “access” mode.
Therefore this is a question with no correct answer but if we have to choose an answer, we will choose answer A. At least it is correct in theory.
Exam with this question: CCNA v3.0 (200-125) Study Guide – Exam Dumps
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