DNS: Difference between revisions
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UDP: For all general purpose DNS Requests like nslookup, client's requests, etc
TCP: For Server to Server Communication like Zone transfer as this process needs reliable protocol.
;Zone transfer
It is the process of replicating a zone file to another name server, and is accomplished by copying the zone file information from the master server to the secondary server.
Zone transfers take place when names and IP address mappings change in a domain.
; Who decides it?
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