1. Primary Zone
   1. R/W container
   2. Standard and AD-Integrated
   3. Only zones which can be edited
2. Secondary Zone
   1. Keeps a RO copy of a primary zone
3. Stub Zone
   1. RO copy of master zone but contains only NS and SOA dns records
   2. Not a replacement of secondary zone
   3. Different from conditional forwarders
4. Reverse Lookup Zone
   1. Contains PTR dns records

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