Your company has one main office and four branch offices.
The main office contains a standard primary DNS zone named adatum.com. Each branch
office contains a copy of the adatum.com zone.
When records are added to the adatum.com zone, you discover that it takes up to one hour
before the changes replicate to each zone in the branch offices.
You need to minimize the amount of time it takes for the records to be updated in the branch
offices.
What should you do?
A.
On the DNS server in the main office, configure the Notify settings.
B.On the DNS servers in the branch offices, configure the Notify settings.
C.On the DNS servers in the branch offices, configure the Zone Aging/Scavenging
Properties.
D.On the DNS server in the main office, configure the Zone Aging/Scavenging Properties.
Answer is: A
https://technet.microsoft.com/en-us/library/cc739924(v=ws.10).aspx
“Notify lists can be created and managed to provide a method for a master server for a zone (such as the primary server or another secondary server) to notify a list of secondary servers when the zone changes.”