RFC 867

RFC 867 Daytime Protocol

[3] RFC 867 - Daytime Protocol, , https://tools.ietf.org/html/rfc867

[1] NIST Internet Time Service (ITS) | NIST, , https://www.nist.gov/pml/time-and-frequency-division/time-distribution/internet-time-service-its

[2] ACTS 形式とは少し違う。