Forward and reverse mapping | The PTR record in the zone file | Creating a reverse zone file

This video explains the following topics.
What is the forward mapping
What is the reverse mapping
Differences between the forward lookup zone file and reverse lookup zone file
What is the PTR record
Meanings of the PTR record's fields
What is the IN-ADDR domain
What is the IPv6 domain
What is the APRA domain
How to create a reverse lookup zone file from the forward lookup zone file
The easiest way to create a reverse lookup zone file

This video is based on the following tutorial.