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VLAN Trunking Protocol
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol used for exchanging VLAN information between switches in a network. VTP allows for easy management and consistency of VLAN configuration across multiple switches in a network.
With VTP, a switch can advertise its VLAN configuration to other switches in the network. When a switch receives VTP updates from another switch, it can automatically update its own VLAN configuration to match the received configuration. This allows network administrators to easily add, delete, or modify VLANs across the network by configuring just one switch, rather than having to configure each switch individually.
VTP operates in three modes: server, client, and transparent. In server mode, a switch can create, modify, and delete VLANs, and advertise its VLAN configuration to other switches in the network. In client mode, a switch can receive VLAN information from a VTP server, but it cannot create, modify, or delete VLANs. In transparent mode, a switch does not participate in VTP updates, but it can forward VTP advertisements to other switches in the network. When configuring VTP, it is important to consider the VTP domain name, which is used to identify the VTP domain to which a switch belongs. All switches in a VTP domain must have the same VTP domain name and VTP version number.
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