Transport – Transport service

Agents offering the Transport service provide end-to-end reliability and fragmentation/reassembly for large datagrams. They may also support connection-oriented services for data streaming. Agents providing this service typically use the Routing service for multi-hop delivery of data.

All agents supporting this service support the Datagram service, along with the RELIABILITY and FRAGMENTATION capabilities. It is also recommended that they support the CANCELLATION and PROGRESS capabilities, since datagrams at this level are likely to be large.


  • SWTransport – provides a batch stop-and-wait ARQ based end-to-end reliable transport service