· VTP sends messages between trunked switches to maintain VLANs on these switches in order to properly trunk.
· VTP is a Cisco proprietary method of managing VLANs between switches and runs across any type of trunking mechanism.
· VTP messages are exchanged between switches within a common VTP domain.
· VTP domains must be defined or VTP disabled before a VLAN can be created.
· Exchanges of VTP information can be controlled by passwords.
· VTP manages only VLANs 2 through 1002.
· VTP allows switches to synchronize their VLANs based on a configuration revision number.
· Switches can operate in one of three VTP modes: server, transparent, or client.
· VTP can prune unneeded VLANs from trunk links.
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