RFC 3941:Negative-Acknowledgment (NACK)-Oriented R...
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Protocol Operation


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... In addition to data content, other sender messages or commands may be employed as part of protocol operation. These messages may occur outside of the scope of application data transfer. In NORM ...
... RTT information among those other group members it learns during protocol operation. ...
... To facilitate deterministic NORM protocol operation, the sender should robustly advertise its current estimation of GRTT ...
... When NORM protocol operation includes mechanisms that excite feedback from the group at large (e.g., congestion control ...



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