SOA and NS

Anyone to explain the difference between SOA and NS records
Let's say we have Active Directory Domain,

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SOA (Start Of Authority)
The record describes the source of the zone (master Server)
Contact person
Serial number for the zone, this is used to manage the propagation of the changes to subordinate servers (master/slave setup) Commonly the YYYYMMDDii is used where ii is an index allowing for multiple changes within the same day.
The remaining are global zone setting
refresh, how frequently the slaves will check to refresh the zone
retry how frequently they will try of failure
expire defines how long this zone is valid since it was retrieved successfully. i.e. the slave name server will stop reflecting the zone after it has not been able to retrieve the zone longer than the expire set, commonly set to 30 days.
minimum sets how long the individual records (TTL) within the zone unless a specific entry exists on each record.

The SOA is one of many records.

NS is a record that defines which name servers are responsible for this zone.  This record is in addition to the Domain registration record.

other records in the zone are A, CNAME, PTR, MX, TXT, SRV, LOC, etc.
jskfanAuthor Commented:
Let s say when you create Domain controllers at the same time they are DNS servers, the domain name is mycompany.local
which DC will be in the SOA and which DC will be in NS ?
With AD integrated zones, each DC will be reflected in the SOA as the source/master as well as both will be reflected in the NS record.

I am unsure what you are after which makes it difficult to figure out what is between the lines.

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jskfanAuthor Commented:
Thank you..I will come back to this later
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