ARDP minutes (Asynchronous Reliable Delivery Protocol) are a communication protocol, which was developed for the Prospero service. It is used however also for services such as NetCheque, NetCash or PPV. A time long was discussed to use ARDP as alternative to TCP. It works a Layer over UDP.

ARDP was developed as question answer minutes, with which under normal conditions the Client asks an inquiry with as few packages as possible and to which server sends then an answer. The server may put inquiries into a queue and send the answer away, if the data are available. In the meantime it can take and answer further against inquiries. ARDP was conceived in such a way that the Overhead, which results from the Sicherstellung of the data integrity (TCP compares), as possible is as small. ARDP was thus developed, in order data integrity without the connecting up and - dismantling Overhead of TCP to guarantee. As long as no special treatment is necessary, the header is small held and no data are lost so long, no further packages are sent away.

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• Asynchronous Reliable Delivery Protocol
  This appendix describes the asynchronous reliable delivery protocol (ARDP) used by Prospero. As used by Prospero, this protocol is layered on top of the ...


• Citations: The Asynchronous Reliable Delivery Protocol - Institute ...
  Information Science Institute, University of Southern California, The Asynchronous Reliable Delivery Protocol , URL: <http://gost.isi.edu/info/ardp/>