VTP is stands for VLAN Trunking Protocol is a Cisco proprietary protocol used by Cisco switches to exchange VLAN information. A network switch, which is participating in VLAN Trunking Protocol (VTP), can have three different modes. VTP enables you to create the VLAN only on a single switch. That switch can then propagate information about that VLAN to each switch on a network and cause other switches to create VLAN Trunking Protocol (VTP) Modes, Server Mode, Client Mode, Transparent Mode. that VLAN too. VTP is available on most of the Cisco Catalyst Family products.