{"draft":"draft-ietf-ntp-extension-field-07","doc_id":"RFC7822","title":"Network Time Protocol Version 4 (NTPv4) Extension Fields","authors":["T. Mizrahi","D. Mayer"],"format":["ASCII","HTML"],"page_count":"8","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Network Time Protocols","abstract":"The Network Time Protocol version 4 (NTPv4) defines the optional\r\nusage of extension fields.  An extension field, as defined in RFC\r\n5905, is an optional field that resides at the end of the NTP header\r\nand that can be used to add optional capabilities or additional\r\ninformation that is not conveyed in the standard NTP header.  This\r\ndocument updates RFC 5905 by clarifying some points regarding NTP\r\nextension fields and their usage with Message Authentication Codes\r\n(MACs).","pub_date":"March 2016","keywords":["NTP","extension field"],"obsoletes":[],"obsoleted_by":[],"updates":["RFC5905"],"updated_by":["RFC9748"],"see_also":[],"doi":"10.17487\/RFC7822","errata_url":null}