Each switch can use one of three different VTP modes:
1. VTP client mode – a switch using this mode can’t change its VLAN configuration. That means that a VTP client switch can’t create or delete VLANs. Received VTP updates are processed and forwarded.
2. VTP server mode – a switch using this mode can create and delete VLANs. A VTP server switch will propagate VLAN changes. This is the default mode for Cisco switches.
3. VTP transparent mode – a switch using this mode doesn’t share its VLAN database, but it forwards received VTP advertisements. You can create and delete VLANs on a VTP transparent switch, but the changes are not sent to other switches.
NOTE – you can’t completely disable VTP on Cisco switches.