[Hansang Bae <hbae@xxxxxxxxxx>]

Fabiana moreno wrote:
> So every retransmission is a packet lost?

Well, you can have duplicate retransmissions, but yes.  But the 
manifestation will be different if you are the receiver or the sender. 
As the sender, you will *know* that you are resending a particular packet.

As a receiver, you will get a packet that is (seemingly) out of order, 
and you will send duplicate ack's to trigger a fast retransmission.  In 
other words, packets 1, 2, 3 arrive, followed by 5, 6 7.  You will then 
ack for #4.

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Thanks,
Hansang