Hi Frederic, many thanks for your email. I feel I have something to learn about bandwidth, throughput, etc. Let's answer to yoru questions. Frederic Lemoine wrote: > > Hello, > > I have been using ntop for about 2 months, and I am very very happy with. > > I have some question regarding the terminolgy used. > > In the Stats screen, we can see the In the IP Traffic screen , > we can see the R-L, L-R, L-L usage. At the bottom of those screens, we see > the > If you look at http://webopedia.internet.com/, you definitions are correct. > I am a bit confused because I do not understand why you have used the word > Throughput and not Bandwidth for the Stats. As far as I know, throughput is > the amount of data moved successfully from one place to another in a given > time period. As this screen does not show point to point communication, I > would interprete it as a bandwidth measurement, which is how fast data flows > on a given transmission path. Maybe you will think that this remark is > somehow "picky", but I would be sure that I am correctly interpreting this > screen: let's say I read a troughput of 1 Mbps, and that I have a 10 Mbps > network, then I conclude that my network is used at 10% of its capability. > Right ? See this: throughput: The amount of data *transferred* from one place to another or processed in a specified amount of time. bandwidth: The amount of data that *can* be transmitted in a fixed amount of time. As ntop sees data that has already been transmitted, I think that I'm dealing with throughput, whereas bandwidth looks to me as a "max thpt". Again, I'm ready to fix ntop, let's make sure that you're definition is correct. What do you think about "Network Load" ? > My second question concerns the IP Traffic screens. Those data are > cumulative, since when ntop was started aren't they ? It is not a average > measure on the last x minutes, isn't it ? Yes it's cumulative. Non-cumulative is for instance Stats -> Traffic > > Many thanks for answering my questions. > > Fred. You're welcome. Cheers, Luca -- Luca Deri Telecom Italia IT Via Matteucci 34/B 56124 Pisa, Italy. Ph. +39/050/968.639 Fax. +39/050/968.626 Email: [EMAIL PROTECTED] WWW: http://luca.ntop.org/ ICQ: 68183632 Software is about stuff, about getting hands dirty - Jim Coplien
