Editing Network Time Protocol (section)

=== SNTP ===
As NTP replaced the use of the old [[Time Protocol]], some use cases nevertheless found the full protocol too complicated. In 1992, '''Simple Network Time Protocol''' ('''SNTP''') was defined to fill this niche. The SNTPv3 standard describes a way to use NTPv3, such that no storage of [[state (computer science)|state]] over an extended period is needed. The topology becomes essentially the same as with the Time Protocol, as only one server is used.{{Ref RFC|1361}} In 1996, SNTP was updated to SNTPv4{{Ref RFC|2030}} with some features of the then-in-development NTPv4. The current version of SNTPv4 was merged into the main NTPv4 standard in 2010.{{Ref RFC|5905}} SNTP is fully interoperable with NTP since it does not define a new protocol.{{Ref RFC|5905|rsection=14|notes=no|status=no|quote=Primary servers and clients complying with a subset of NTP, called the Simple Network Time Protocol (SNTPv4) [...], do not need to implement the mitigation algorithms [...] The fully developed NTPv4 implementation is intended for [...] servers with multiple upstream servers and multiple downstream servers [...] Other than these considerations, NTP and SNTP servers and clients are completely interoperable and can be intermixed [...]}} However, the simple algorithms provide times of reduced accuracy and thus it is inadvisable to sync time from an SNTP source.{{Ref RFC|4330}}