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Which protocol is used by Catalyst switches to reduce administration in a switched network?
VLAN Trunk Protocol or VTP is a Cisco-proprietary protocol that is available on most the Cisco Catalyst series switches. VTP reduces administration in a switched network by centralizing the management of VLAN by using a switch in a VTP server mode; Distributing all the VLANs to all the switches in a domain. VTP has four modes; Server, Client, Transparent, and Off. VTP Clients behave the same way as the VTP Server; However, you cannot create, delete, nor edit VLANs. With a VTP Server mode, you can create, edit, and delete VLANs as well as configure other VTP parameters such as VTP usernames/passwords, domains, and versions. With a VTP Transparent mode, VTP advertisements are forwarded (VTP version 2). VTP Transparent switches do not participate in VTP. VTP Transparent switch does not forward its VLAN configuration and does not synchronize its VLAN configuration based on the received advertisements. VTP Off switches behave the same way as the transparent mode, except that VTP advertisements are not forwarded.
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