Encapsulation Types

[nnn_sss22]

Hello

What is function of encapsulation and please explain the encapsulation protocols. dot1q , isl, negotiation. thanks

Regards

[Leo Laohoo]

When we make switchport mode trunk manually then both switches need to trunk negotiation. 

When someone enables Trunk port DTP is automatically disabled, hence, the "dynamic".  

[nnn_sss22]

I understand.

By the way my statement is correct now about DTP?

[Leo Laohoo]

In old switches by default negotiation is on. its means DTP is enable?

If the port doesn't have any config, negotiation is on. 

negotiation is third type of Encapsulation protocol which by default is on?

DTP is not an "encapsulation' method.  

[nnn_sss22]

Thanks for the help

[nnn_sss22]

In old switches by default negotiation is on. its means DTP is enable? negotiation is third type of Encapsulation protocol which by default is on?

In new switch this type of encapsulation is eliminate. now still DTP is enable by default? if yes then DTP will use it by default 802.1q encapsulation protocol?