VTP (VLAN Trunking Protocol)
The VLAN Trunking Protocol (VTP) is a very useful Cisco proprietary protocol protocol to create, manage and maintain a large network with many interconnected switches. The VLAN Trunking Protocol (VTP) can manage the addition, deletion, and renaming of VLANs from a central point without manual intervention and VLAN Trunk Protocol (VTP) thus reduces network administration in a switched network. VTP minimizes the possible configuration inconsistencies that arise when changes are made. These inconsistencies can result in security violations, because VLANs can cross connect when duplicate names are used.