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 ...
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To facilitate deterministic NORM protocol operation, the sender
should robustly advertise its current estimation of GRTT ...
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When NORM protocol operation includes mechanisms that excite feedback
from the group at large (e.g., congestion control ...