Types of DNS Zones

Dns zones

primary zone,
 read/write copy
stored in txt file(easy to backup and recover)
primary zone must available to make changes.

secondry zone,
read only copy
can be copie of primary , secondary, AD integrated.


AD integrated zone.
only available on DC.
All D.C. have a read/write copy of the zone.
high availability and redundancy (Because DNS in AD, so if AD is down another AD still there so DNS always available)
dis Adv: DNS Zone data not stored as txt file. so harder to restore.
ADV: replicate DNS data with AD, so ur DNS data stored in all Domains. so DNS Zone data is very secure.


Stub Zone:

it contain NS and SOA and A records.

A stub zone is a copy of zone that contains only those resorce records nessory to identify the authoritive DNS server for that Zone.

It resolve names between two diff name space.

used to one corporate wants to use other namespace server and clients info(resolve names)