Does DNS use TCP or UDP or both?

Answer Posted / kyle

Windows DNS uses both, and is more in line with proper standards than it once was. For instance, the port ranges are now set to international standards since Server 2008.

This is a great site about Windows DNS and ports: http://technet.microsoft.com/en-us/library/dd197515(v=ws.10).aspx

Also, some have said TFTP has file size limits, which is generally no longer true. TFTP now is capable of sending files of essentially unlimited size, given a stable enough connection. "If the server and client support block number wraparound, file size is essentially unlimited." Source: http://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol

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