What happens to the network when it is reconnected and a trunk exists between the two switches?

Refer to the exibit:

SwX was taken out of the production network for maintenance. It will be reconnected to the Fa 0/16 port of Sw-Ac3. What happens to the network when it is reconnected and a trunk exists between the two switches?

show vtp status (exhibit):

show vtp and show vlan (exhibit):

show vlan (exhibit):

A.
All VLANs except the default VLAN win be removed from all switches

B.
All existing switches will have the students, admin, faculty, Servers, Management, Production, and no-where VLANs

C.
The VLANs Servers, Management, Production and no-where will replace the VLANs on SwX

D.
The VLANs Servers, Management, Production and no-where will be removed from existing switches

Explanation:
First we should view the VTP configuration of switch Sw-Ac3 by using the show vtp status command on Sw-Ac3

Notice that its configuration revision number is 5 and VTP Domain Name is home-office

Next, from the exhibit we know that SwX has a revision number of 6, which is greater than that of Sw-Ac3 switch, and both of them have same VTP Domain Name called home-office.

Therefore SwX will replace vlan information on other switches with its own information. We should check vlan information of Sw-Ac3 switch with show vlan command

So the correct answer is D The VLANs Servers, Management, Production and no-where will be removed from existing switches

Please notice that in the real CCNA exam you may see a different configuration revision of Sw-Ac3 or of SwX. In general, which switch has a higher revision number it will become the updater and other switches will overwrite their current databases with the new information received from the updater (provided that they are on the same domain and that switch is not in transparent mode). In particular, if the revision number of SwX is lower than that of Sw-Ac3, the answer should be C The VLANs Servers, Management, Production and no-where will replace the VLANs on SwX.