I just added a switch to the network. I manage my own switch and it is not managed by the network admins. I ran a vtp status to see if a vtp domain exists but didn't see anything. I think it exisits but how does one configure it so the vtp domain cannot be seen outside of its core switches? Would this be transparent mode? Also if it is in a blocked or invisible mode how can that be done and how can it be undone?