June 2017
Beginner to intermediate
742 pages
18h 29m
English
Content preview from Mastering Active Directory
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Start of authority record
Each DNS zone must have a start of authority (SOA) record, and it is created when a zone is created for the first time. This record provides lots of general information for the DNS zones, such as the following:
- Primary server: The best DNS source for the zone.
- Responsible person: The email address of the zone administrator.
- Serial number: A number that is used to track the zone changes. If there is a secondary DNS zone on another server, when it checks the updates with the master zone, it will compare this serial number. If the secondary zone has a lower serial number than the master zone, it will update its copy.
- Refresh interval: This value is defined when the secondary server should check with the master server ...
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