DNS: Difference between revisions

226 bytes added ,  6 years ago
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; Who decides it?
*UDP can be used to exchange small information whereas TCP must be used to exchange information larger than 512 bytes.
 
*If a client doesn’t get response from DNS it must retransmit the data using TCP after 3-5 seconds of interval.
{{UC}}
 
; When will firewall close a session opened for DNS?