For all switches in a VTP domain, the VTP version, VTP password, and VTP domain name must be the same. Moreover, switches that will share VLAN information must be operating in VTP server mode, must be using the same VLAN tagging method (either 802.1q or ISL), and must be connected with trunk links.

Many of these settings can be verified by using the show vtp status command. By viewing the output of the command on two switches that are not sharing information, inconsistencies that prevent the sharing of VLAN information can be identified.

The command to set the VTP domain name is:
Switch62(config)#vtp domain corporate
Switch62 is operating in Client mode, which means it will accept VLAN changes sent by switches operating in Server mode once the domain name mismatch is corrected. It will both process them and forward them, but will not allow VLAN changes to be made locally, and it will not save any of the VLAN information in NVRAM (line 5). The command to place a switch into Client mode is:
Switch62(config)#vtp mode client
Switch60 is operating in Server mode and will allow changes to be made locally, will send those changes to other switches, and WILL save all changes (both learned and made locally) in NVRAM, as shown by line 5. The command to place a switch into Server mode is:
Switch62(config)#vtp mode server
Switch61 is operating in Transparent mode. It will allow changes to be made locally and WILL save all changes made locally in NVRAM, but will NOT send those changes to other switches, as shown in line 5. It will accept and pass along VTP changes from switches operating in Server mode, but will not save those changes in NVRAM. The command to place a switch in Transparent mode is:
Switch62(config)#vtp mode transparent
Switch63 will ignore any information it receives from the other switches, even though the domain name matches, because it has a higher configuration revisionnumber (63) than the other switches. These revision numbers are used by the switches to prevent unnecessary processing of changes that have already beenreceived.

VTP is used to synchronize Virtual Local Area Network (VLAN) databases across switches. VTP server switches can be used to add, delete, or rename VLANs, which are then synchronized over the network with VTP client switches. This allows a network administrator to create a VLAN once, as opposed to having to create it individually on every switch on the network. The password is used to validate the source of the VTP advertisements sent between the switches in the VTP domain.

The option stating that the configuration revision number must be configured identically on all switches in a VTP domain is incorrect. The configuration number cannot be directly configured, but is instead synchronized during VTP updates.

The option stating that VLANs configured on clients should exist on the server switch is incorrect. VTP clients do not allow local VLAN configuration, and can only receive VLANs via VTP synchronization over the network.