> There was a quote from the document: "Some protocols use > keepalives, heartbeats or other messages to exchange control > information." A naive reading of this text is that it is > discussing ways to exchange control information, and giving > specific examples of keepalives and heartbeats as messages used to > exchange control information (while admitting the existence of > other such messages). This is as surprising to me as it is to Tom > -- keepalives and heartbeats do not, in my experience, contain > control information! > > Your follow-up discussion suggests that the intent is to say that > "some protocols use regular/periodically/frequently exchanged > messages, such as for keepalives, heartbeats, or > control-information exchange" and to leverage that traffic for FT > purposes. I suggest that this be clarified in the text of the > document. I tend to bin packets as either "data" or "control", which is probably why the sentence reads like it does. However, we don't have to figure out who is right here. I think the intent of the document is to say one can scrape a FT sample from a non-data exchange. That is the important part and doesn't seem to be an issue. I have made a note to say that more directly. Thanks, allman
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