I believe only way to configure VTP domain is by CLI., Anyway i heard when we configure trunk from a switch A(which is in VTP domain (say cisco)) to another switch B which dont belong to any VTP domain., the second switch automatically assigned to switch A (VTP domain)., is that so ? i cant find anywhere this.,
This is correct!
When Cisco implemented VTP, they left a "null" value for exactly this reason. If a VTP client or server with a null domain receives a VTP message with the domain populated, it will assume the domain of the received message and add applicable VLANs to its database.
You can find more information here:
Its true. The 2nd switch will be assigned the domain from 1st switch.
A quick test to prove it.
Quick output: running-configs do not have the vtp configurations.