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RFC 7822
Title: Network Time Protocol Version 4
(NTPv4) Extension Fields
Author: T. Mizrahi, D. Mayer
Status: Standards Track
Stream: IETF
Date: March 2016
Mailbox: talmi@marvell.com,
mayer@ntp.org
Pages: 8
Characters: 15759
Updates: RFC 5905
I-D Tag: draft-ietf-ntp-extension-field-07.txt
URL: https://www.rfc-editor.org/info/rfc7822
DOI: http://dx.doi.org/10.17487/RFC7822
The Network Time Protocol version 4 (NTPv4) defines the optional
usage of extension fields. An extension field, as defined in RFC
5905, is an optional field that resides at the end of the NTP header
and that can be used to add optional capabilities or additional
information that is not conveyed in the standard NTP header. This
document updates RFC 5905 by clarifying some points regarding NTP
extension fields and their usage with Message Authentication Codes
(MACs).
This document is a product of the Network Time Protocol Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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