…document. Compared to other transport protocols, UDP and its UDP-Lite variant [ RFC3828 ] are unique in that they do not establish end-to-end connections between communicating end systems. UDP communication consequently does not incur connection establishment and teardown overhea…

… with UDP or UDP-Lite The current specifications of UDP [RFC0768] and UDP-Lite [RFC3828] do not define a method in the RFC series that supports PLPMTUD. In particular, the UDP transport does not provide the transport features needed to implement datagram PLPMTUD. The DPLPMTUD met…

…or SCTP, the specification of which is out of this document's scope. (UDP-lite [RFC3828] and UDP zero checksum [RFC6936] are not supported by CoAP.) CoAP messages are encoded in a simple binary format. The message format starts with a fixed-size 4-byte header. This is followed by…