RFC 3091:Pi Digit Generation Protocol
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payload format


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... datagram-based components of the PIgen protocol suite all share the following UDP data payload formats (defined in the ABNF of RFC 2234(-> 4234draft) ...
... Reply Payload Format ...


... UDP service. A random distribution of digits of Pi are sent using the payload format described in section 2.1.2. to the IP multicast group ...



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