TCP chain query requests in DNS

Document Type Expired Internet-Draft (individual)
Last updated 2014-04-18 (latest revision 2013-10-15)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines an EDNS0 extension that can be used by a DNSSEC enabled Recursive Nameserver configured as a forwarder to send a single query over TCP requesting to receive a complete validation path along with the regular query answer.


Paul Wouters (

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