tacack commented on TCP Slow Start at 4:08 a.m. 05 Jul 2011
Great article! Just one question."Notice that at this point the client starts sending an ACK only for every two (or occasionally three) segments, not for every individual segment." Why is this...
View ArticleWarren Chang (guest) commented on TCP Slow Start at 4:42 a.m. 05 Jul 2011
Hi Jeremy,Great article, thanks! However I am a bit of confused after digging to the captured file.From the file:1st cluster (2 segments):Server send #6,8 and client ack #7,9. So next round is 2+2=4...
View Articlemarkosolo commented on TCP Slow Start at 6:27 a.m. 05 Jul 2011
I have just been reading up on RFC 1323 and 2018 - very similar stuff. Might be worth reading this RFC for further info. Thanks Stretch.
View Articlestuart475898 commented on TCP Slow Start at 8:16 a.m. 05 Jul 2011
tacack,Reading through RFCs 5681(4.2), and more specifically 1122(4.2.3.2), it appears that an ACK maybe be sent for every few segments to increase network efficiency. Given that the RFC states that...
View Articlekip (guest) commented on TCP Slow Start at 1:35 p.m. 05 Jul 2011
Wow I like your article very much. I wish you were my teacher.
View ArticleXboy_mr commented on TCP Slow Start at 6:00 p.m. 05 Jul 2011
hey, jeremy. how did your job go? was is good and pleased you? i.e. was it what you expected or after you saw your position it just disappointed you !!!!
View ArticleDan (guest) commented on TCP Slow Start at 1:31 a.m. 06 Jul 2011
I'm sure many of you have already seen it, but for those who haven't, here's a paper from some Google folks regarding a proposed increase to the initial CWND far above the values referenced in RFC...
View ArticleEric (guest) commented on TCP Slow Start at 2:58 a.m. 06 Jul 2011
Articles like these ones are the ones I really enjoy.
View Articlejsicuran (guest) commented on TCP Slow Start at 8:04 p.m. 13 Jul 2011
Great article.. For anohter great explenation look up the Cisoc Internet Protocol Journals (IPJ) articles titled "TCP Performance". There were publised in 2000 and were 2 segemnts. Execllent breakdown...
View Articlealbert (guest) commented on TCP Slow Start at 6:16 a.m. 22 Aug 2011
Hi, Jeremy,Thanks for the great detailed posting, I've learnt a lot from that and when I dig into the more detail, I found something that I would like to share:seems the RTT is not 50ms, but rather...
View Articledlau (guest) commented on TCP Slow Start at 8:07 a.m. 30 Oct 2011
Nice article, this is really helping me with realizing slow start within a time/seq graph.
View Articlekevin (guest) commented on TCP Slow Start at 6:26 a.m. 01 May 2012
Hi albert,The 50 ms RTT also puzzled me. Looking at the trace, the receiver sent ACK right after with 0.0002s delay (rather than 50ms) on packets #7 and #9.Can someone elaborate on the server...
View ArticleRob (guest) commented on TCP Slow Start at 5:59 p.m. 13 Dec 2012
Kevin,the capture is from the user's standpoint, so all ACKs will be immediate. What you need to see is the first 2 packets #6 and #8 were sent from the server at the same time, then there is a ~50ms...
View Articleithitman (guest) commented on TCP Slow Start at 6:52 p.m. 18 Feb 2013
@tacack You are correct about the 'delayed ACK'. It is a mechanism that can be implemented to improve network efficiency by only acknowledging every second packet. An ACK may be delayed up to 500ms,...
View ArticleSiddharth Padmanabhan (guest) commented on TCP Slow Start at 8:53 p.m. 09 Apr...
Hi Jeremy,Thanks for the good write up.I am working on a side project that involves finding server characteristics such as icw, ssthresh etc. I have written the code in python. So far, I have got a...
View ArticleManuel (guest) commented on TCP Slow Start at 1:14 a.m. 29 Mar 2014
I bet many of us are expecting the congestion avoidance algorithm article. Jeremy knowledge in this matter is outstanding.
View ArticleJaume (guest) commented on TCP Slow Start at 8:30 a.m. 19 May 2014
Thanks for the crystal clear explanation of slow start. I was looking for some material to prepare my classes. I think that the plots help a lot in understanding what is going on.I am trying to prepare...
View ArticleJohn (guest) commented on TCP Slow Start at 4:16 a.m. 30 Jan 2015
Stretch - great article as always. I think I spot an error though. Above you say "The MSS for either side of a TCP connection is advertised as a TCP option in the SYN packets, and both sides use the...
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