%% You should probably cite draft-stenn-ntp-extension-fields-09 instead of this revision.
@techreport{stenn-ntp-extension-fields-02,
    number =    {draft-stenn-ntp-extension-fields-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-stenn-ntp-extension-fields/02/},
    author =    {Tal Mizrahi and Danny Mayer and Harlan Stenn},
    title =     {{Network Time Protocol Version 4 (NTPv4) Extension Fields}},
    pagetotal = 10,
    year =      2017,
    month =     sep,
    day =       29,
    abstract =  {Network Time Protocol version 4 (NTPv4) defines the optional usage of extension fields. An extension field, as defined in RFC 5905 {[}RFC5905{]}, resides after the end of the NTP header, and supplies optional capabilities or information that is not conveyed in the standard NTP header. This document updates RFC 5905 {[}RFC5905{]} by clarifying some points regarding NTP extension fields and their usage with legacy Message Authentication Codes (MACs). With the adoption of this update, the authors recommend rescinding {[}Err3627{]}.},
}