%% You should probably cite rfc7822 instead of this I-D. @techreport{ietf-ntp-extension-field-06, number = {draft-ietf-ntp-extension-field-06}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-ntp-extension-field/06/}, author = {Tal Mizrahi and Danny Mayer}, title = {{The Network Time Protocol Version 4 (NTPv4) Extension Fields}}, pagetotal = 8, year = 2015, month = nov, day = 26, abstract = {The Network Time Protocol Version 4 (NTPv4) defines the optional usage of extension fields. An extension field, defined in RFC5905, is an optional field that resides at the end of the NTP header, and can be used to add optional capabilities or additional information that is not conveyed in the standard NTP header. This document updates RFC5905 by clarifying some points regarding NTP extension fields and their usage with Message Authentication Codes (MAC).}, }