This International Standard specifies
a) procedures for the connectionless-mode transmission of data and protocol control information from one transport entity to one peer transport entity;
b) the encoding of the transport-protocol-data-units used for the transmission of data and control information;
c) procedures for the correct interpretation of transport protocol control information; and
d) the functional requirements for implementations claim-ing conformance to this International Standard.
The procedures are defined in terms of
a) the interactions among peer transport entities through the exchange of transport-protocol-data-units;
b) the interactions between a transport entity and a transport service user through the exchange of transport service primitives; and
c) the interaction between a transport entity and a net-work service provider through the exchange of network service primitives.
This International Standard specifies the connectionless-mode transport protocol. The connection oriented transport protocol is specified in ISO 8073.