DNS organizes and manages the namespace database in a specific physical structure using zones. Zones are physical namespace boundaries that contain information about one or more domains and their members:
For example, the itdemolabs.com zone contains both the itdemolabs.com and helsinki.itdemolabs.com domains. Other domains are stored and managed in two separate zones, with each having its own separate zone database.
There are three types of DNS zones, as follows:
- Primary zone: This is the original zone, or the first created copy of a database, where all zone resources are managed.
- Secondary zone: This is the read-only copy of the primary zone and it is updated and managed using zone updates and zone transfers from the primary zone.
- Stub zone: This is the read-only copy of the primary zone database that contains only the resource records needed to locate...