On Jan 16, 2005, at 8:39 PM, Ed Greshko wrote:
Rudolf Ladyzhenskii wrote:DNS is UDP port 53, not TCP
Actually, it is both....if you are going to be doing zone transfers that is.
Actually, it can also use TCP if it's unable to trim the response to fit in a 512 octet UDP datagram. This can happen with large responses, i.e., Akamai or Yahoo hosts that have multiple entries per A record. This is also necessary to support A6 and DNSSEC.
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-- Jason Dixon DixonGroup Consulting http://www.dixongroup.net
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