When configuring VTP, what is the default mode of a switch?

The default mode of a switch when configuring VLAN Trunking Protocol (VTP) is the server mode. In server mode, a switch can create, modify, and delete VLANs for the entire VTP domain. This capability is crucial because it allows changes made on one VTP server to propagate across the network, ensuring that all switches within the same domain have consistent VLAN information.

This server mode is designed for switches that are responsible for VLAN management and propagation. It acts as the primary point where VLAN configuration changes can occur and be shared with other switches configured in the same VTP domain. When a switch is in this mode, it listens for VTP advertisements from other servers and updates its VLAN database accordingly.

Understanding the default mode is essential for managing VLANs effectively within a network, especially in larger environments where consistency in VLAN management is critical to network performance and organization.