{"draft":"draft-ietf-dnsind-edns0-02","doc_id":"RFC2671","title":"Extension Mechanisms for DNS (EDNS0) ","authors":["P. Vixie"],"format":["ASCII","HTML"],"page_count":"7","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"DNS IXFR, Notification, and Dynamic Update","abstract":" The Domain Name System's wire protocol includes a number of fixed fields whose range has been or soon will be exhausted and does not allow clients to advertise their capabilities to servers.  This document describes backward compatible mechanisms for allowing the protocol to grow.  [STANDARDS-TRACK]  ","pub_date":"July 1999","keywords":["EDNS0","domain name system","RR","resource records","opt"],"obsoletes":[],"obsoleted_by":["RFC6891"],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC2671","errata_url":null}