https://app.knowbase.one/vault/rfc/docid/3775
RFC3639: Considerations on the use of a Service Identifier in Packet Headers
Network Working Group M. St. Johns, Ed. Request for Comments: 3639 G. Huston, Ed. Category: Informational IAB October 2003 ...
https://app.knowbase.one/vault/rfc/docid/5881
RFC5401: Multicast Negative-Acknowledgment (NACK) Building Blocks
Network Working Group B. Adamson Request for Comments: 5401 Naval Research Laboratory Obsoletes: 3941 C. Bormann Category: Standards Track Universitaet Bremen TZI ...