Phil Karn (email@example.com)
Mon, 28 Jul 86 00:03:39 edt
Forget the Nagle algorithm for the moment; I confused the issue by
bringing it up.
Assuming ACKs aren't lost, unnecessary retransmissions are avoided
as long as you have "first only" retransmission at the sender plus
"in window" acceptance at the receiver.
As I said, "ack retransmission" (i.e., acking acks) is a last-ditch
approach for use over very unreliable links. I'm not sure it'd be
at all appropriate at the transport (host-host) layer.
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