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- VLAN Trunking Protocol (VTP) is a Cisco Layer 2 messaging protocol.
- Manages the addition, deletion, and renaming of VLANs on a network-wide basis.
- VTP reduces administration in a switched network.
- When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This reduces the need to configure the same VLAN everywhere. To do this VTP carries VLAN information to all the switches in a VTP domain.
- VTP advertisements can be sent over ISL, 802.1q, IEEE 802.10 and LANE trunks.
- VTP ensures that all switches in the VTP domain are aware of all VLANs.
- VTP pruning is a feature used to eliminate (or prune) the unnecessary traffic.
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