What is the main function of VTP?

The main function of VTP, or VLAN Trunking Protocol, is to synchronize VLAN configuration across switches within the same VTP domain. VTP facilitates the management of VLANs by allowing network administrators to create, delete, and rename VLANs from a central switch, which communicates these changes to all other switches in the domain. This ensures that all switches remain consistent with the VLAN configuration, thereby reducing the risk of misconfiguration and simplifying the overall network management.

When you add or change a VLAN on one switch configured for VTP, these changes are propagated to all other switches in the VTP domain. This automatic synchronization helps maintain a coherent VLAN strategy across the entire network, making it easier to manage VLAN assignments and minimizing the potential for errors due to human intervention in multiple switch configurations.

The other options pertain to different networking functions that are not related to VTP. Adding static routes deals with manual routing configuration, managing IP addressing involves assigning and managing IP addresses within a network, and controlling access lists focuses on defining security rules related to traffic filtering and control. None of these functions pertain to the primary purpose of VTP, which is specifically concerned with VLAN management.