What is the function of a VTP server in a VLAN Trunking Protocol context?

In a VLAN Trunking Protocol (VTP) context, the primary function of a VTP server is to create and manage VLANs within a VTP domain. The VTP server has the authority to add, delete, and modify VLANs, and it propagates this information to all other switches in the VTP domain, which can either be VTP clients or other VTP servers.

When a VTP server adds or modifies a VLAN, it sends VTP advertisements to inform other switches of these updates. VTP ensures that all switches within the domain maintain a consistent VLAN configuration, simplifying management and reducing the potential for errors. By effectively centralizing VLAN management, the VTP server minimizes the risk of inconsistencies in VLAN configurations across the network.

In contrast, the other options do not accurately reflect the role of a VTP server. For example, while restricting VLAN access is essential for network security, it does not align with the function of a VTP server, which is focused on VLAN management. Monitoring traffic is typically handled by different mechanisms and is not related to VTP's scope. Additionally, the role of acting as a backup switch pertains to redundancy and failover strategies, which is separate from the VLAN management capabilities offered by V