Cisco Certified Network Professional Practice Test 2025 – Your All-in-One Guide to Exam Success!

In VLAN Trunking Protocol (VTP), a change that resets the revision number occurs when there is a modification to the VTP mode or domain name. Specifically, altering the VTP mode (for instance, transitioning from server to transparent mode) or changing the VTP domain name triggers a revision number reset because it indicates a fundamental change in how the switches will handle VLAN information and synchronization within the VTP domain.

When the VTP mode is set to transparent, the switch no longer participates in VTP advertisements or propagates VLAN configuration changes to other switches. As such, this action necessitates a fresh revision number to ensure that any future VLAN updates can be managed appropriately. Changing the domain name also enforces the need to reset the revision number as it can signify an entirely different network configuration, thus impacting how VLAN information is shared across the network.

The other scenarios, while they may affect the switch and its configuration, do not specifically result in a revision number reset. For instance, a switch reboot does not inherently trigger a revision number reset; it simply restarts the switch without changing its configuration. VLAN deletion, likewise, updates the current state of the VLANs but does not reset the entire revision process. Network congestion is unrelated to the revision