DTP

[jonk34567]

Which DTP switch port mode allows the port to create a trunk link if the neighboring port is in trunk mode, or desirable auto mode?
A. Dynamic auto
B. Trunk
C. Dynamic desirable
D. Access

[chintan_shah]

Hi jonk34567,

If one side of the port is in trunk mode & other interface is configured with Trunk or Dynamic Auto/Desirable, a Trunk link will be formed between two switches.

trunk  + trunk/dynamic auto/dynamic desirable  = TRUNK LINK

If one side of the port is in dynamic auto mode & other interface is configured with Trunk or Dynamic Desirable, a Trunk link will be formed between two switches.

dynamic auto + dynamic desirable/trunk = TRUNK LINK.

As for the exchanging of DTP frames, these are sent when a port is in the following states: Dynamic Desirable and Trunk.

DTP frames are NOT sent when a port is configured as Dynamic Auto, Non-negotiate or Access.

So, even if a port is in Dynamic Auto and doesn’t send DTP frames, it is still considered Negotiation ON because it can be affected by the DTP frames it receives.

HTH!

[Deepak Kumar]

DTP Negotiated Interface Modes

	Dynamic Auto	Dynamic Desirable	Trunk	Access
Dynamic Auto	Access	Trunk	Trunk	Access
Dynamic Desirable	Trunk	Trunk	Trunk	Access
Trunk	Trunk	Trunk	Trunk	Limited connectivity
Access	Access	Access	Limited connectivity	Access

Check this table and found your answer.

Regards,

Deepak Kumar