scope:

This Recommendation I 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 claiming conformance to this Recornmendation International Standard.

The procedures are defined in terms of

a) the interactions among peer transport entities through the exchange of transport-protocol-data-units;

c) the interactions between a transport entity and a transport service user through the exchange of transport service primitives; and

d) the interaction between a transport entity and a network service provider through the exchange of network service primitives.

This Recommendation I International Standard specifies the connectionless-mode transport protocol and provides the PICS Proforma in compliance with the relevant requirements, and in accordance with the relevant guideline, given in CCITT Rec. X.291 I ISOAEC 9646-2. The protocol for providing the connection-mode transport service is specified in ITU-T Rec. X.224 I ISOAEC 8073.