dg@lakart.UUCP (David Goodenough) (05/04/89)
In a "g" protocol environment, I can see that the following could occur: His receive window is size 3 I send packet 1, then 2, then 3. He acks packet 1, but I miss the ack due to line noise. He acks packet 2, and that ack gets through. I'm expecting an ack for 1, but here's one for 2. Can I assume that he saw packet 1 OK, because he's just acked packet 2? i.e. does an ack for packet n count as an ack for all outstanding packets up to n. -- dg@lakart.UUCP - David Goodenough +---+ IHS | +-+-+ ....... !harvard!xait!lakart!dg +-+-+ | AKA: dg%lakart.uucp@xait.xerox.com +---+
budd@bu-cs.BU.EDU (Philip Budne) (05/06/89)
In article <531@lakart.UUCP> dg@lakart.UUCP (David Goodenough) writes: >Can I assume that he saw packet 1 OK, because he's just acked packet 2? i.e. >does an ack for packet n count as an ack for all outstanding packets up to n. Yes. RR 2 ACKs all packets upto and including packet 2. RJ 3 does the same AND requests retransmission of packet 3. Phil Budne Boston U
dtynan@altos86.UUCP (Dermot Tynan) (05/09/89)
In article <531@lakart.UUCP>, dg@lakart.UUCP (David Goodenough) writes: > > Can I assume that he saw packet 1 OK, because he's just acked packet 2? i.e. > does an ack for packet n count as an ack for all outstanding packets up to n. > > dg@lakart.UUCP - David Goodenough +---+ Yes. The 'ACK' is for all packets up to and including 'N'. - Der -- My address: dtynan@altos86.Altos.COM (Hopefully!) Otherwise: {altnet,amdahl,pyramid,sun}!altos86!dtynan --- "May the blessings of Jeyes Fluid fall upon you" ---