The Network Time Protocol Version 4 Extension Format
A. Kumar
Universitaet Regensburg
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 can be used to add optional capabilities or additional information that is not conveyed in the standard NTP header. This document redefines NTP extension header proposed in RFC 5905 for addressing unnecessary padding issue which is required for differentiating between NTP extension and MAC data.