Why DNS use both TCP and UDP ports. And for which purpose it uses TCP and UDP.

Why DNS use both TCP and UDP ports. And for which purpose
it uses TCP and UDP.

Question Posted / nravikiran

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Accenture, HCL, I also Faced
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Why DNS use both TCP and UDP ports. And for which purpose it uses TCP and UDP...

Answer / björn

DNS uses TCP for Zone Transfers.
UDP is used for Translation IP -> FQDN or FQDN -> IP
FQDN = Full Qualified Domain Name

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