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Tow of them related to switches , the vtp protocol function to share a vlan between switches and mange them , and the stp protocol function is to block the looping
STP stands for spanning tree protocol and VTP stads for VLAN Trunking protocol.
STP is by default on in all switches to avoid loop. VTP operates in a domain where switches operates in three modes : server, client and transparent.
VTP Server propagates all VLAN which are created or removed in server to all VTP client in the same VTP domain.
VTP Clients are not allowed to create VLAN. They receive VLAN information from the VTP server.
Transparent switches maintain their own separate VLAN database, and will neither advertise nor accept any VLAN database information from the switches, even a server.
STP (Spanning Tree Protocole) is used to avoid and resolve loops in a network , The VTP (VLAN Trunking protocole ) is used to controle and manage trunking networks ..it means if you have a lot of switch in a network you can design a switch in mode Server to update and controle the other switchs ( mode client or transparent) without moving to the location ..