VTP devices in a network track the VTP revision number. What is a VTP configuration
revision number?

A.
A number for identifying changes to the network switch.

B.
A number for identifying changes to the network router.

C.
A number for identifying changes to the network topology.

D.
None of the other alternatives apply.

Explanation:
The configuration revision number is a 32-bit number that indicates the level of revision for a
VTP packet. Each VTP device tracks the VTP configuration revision number assigned to it,
and most of the VTP packets contain the VTP configuration revision number of the sender.
This information is used to determine whether the received information is more recent than
the current version. Each time you make a VLAN change in a VTP device, the configuration
revision is incremented by one. In order to reset the configuration revision of a switch,
change the VTP domain name and then change it back to the original name.
Incorrect Answers:
A: Not all switch configuration changes will impact the VTP revision number. Only changes
made to the VLAN configuration will cause an increment in the revision number.
B: VTP revision numbers are only used on network switches configured for VTP and are not
used by Cisco routers.
Reference: Understanding and Configuring VLAN trunk protocol (VTP) Document ID:
10558http://www.cisco.com/warp/public/473/21.html