This document discusses VLAN Trunking Protocol (VTP) which allows switches to exchange VLAN configuration information and manage VLANs across multiple switches. It describes VTP domains, modes, advertisements and pruning. VTP is configured on switches to distribute VLAN information throughout a converged network and troubleshoot configuration issues. Proper VTP configuration ensures switches within the same VTP domain automatically update to reflect any new VLANs or changes made to existing VLANs.