Measure exact throughput of any TCP IP network

Jul 9, 2008
Updated • Mar 11, 2013

Wondering how much traffic can be pulled through the network you're working in during certain period of time or how quickly your network components work? Yeah, be a networking proffesional or a regular home user with a small LAN (like me :) ), it's always good to know what's your network capable of. But how do we find out? Well, some smart IT guys thought a utility capable of precisely measuring the amount of data flow within a period of time could come in handy and were so kind to share these tiny yet sophisticated utilities. Though, you do need to be able to access both endpoints between which you want to measure since the applications must be running on both sides in a server-client setting. Let the measuring begin!

NetCPS - the easier way

This little tool called NetCPS (a single executable file) is rather simplistic, no fancy features as the author (credits to Jarle Aase) says. It pumps 100MB of generated data (without accessing the HDD which could mess with the final result) and then displays the result in form of average speed stated in both KB/s and MB/s. Sourcecode is available for download as well in case you'd like to do some further tinkering with it. Freely usable unless you intend to use it on behalf of military or government.

Example of use:

Server-side end-point: netcps -server
Client-side end-point2: netcps *IP address/hostname of the host*

Additional switches to change the default port (4455) and default amount of transfered data (100MB) are supported. Use the -help switch for further instructions.

Iperf - the powerful way

This tool on the contrary is rather advanced while still maintaining its portability and small size. It can measure performance with many different settings but those are optional and not neccessary for the essential purpose of finding out what the network's throughput is. You can affect a lot of settings by changing them with various switches. Take notice of the example screenshot for instance, where the port used is changed to 1234, amount of sent data set to 200 MB, interval of reports set to 2 seconds for better accuracy and report format set to MBytes. Iperf can be run as a solid Windows service as well. Here's a download link to the compiled Windows version of Iperf (a single executable).

Example of use:

Server-side end-point: iperf -s -p 1234
Client-side end-point2: iperf -c *IP address/hostname of the host*

Many additional switches and settings are available for advanced use of this nifty utility. The usual -help switch brings up further instructions again.


Tutorials & Tips

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  1. ilev said on August 4, 2012 at 7:53 pm

    Doesn’t Windows 8 know that www. or http:// are passe ?

    1. Martin Brinkmann said on August 4, 2012 at 7:57 pm

      Well it is a bit difficulty to distinguish between domains and files for instance.

    2. Leonidas Burton said on September 4, 2023 at 4:51 am

      I know a service made by google that is similar to Google bookmarks.

  2. VioletMoon said on August 16, 2023 at 5:26 pm

    @Ashwin–Thankful you delighted my comment; who knows how many “gamers” would have disagreed!

  3. Karl said on August 17, 2023 at 10:36 pm


    The comments section under this very article (3 comments) is identical to the comments section found under the following article:

    Not sure what the issue is, but have seen this issue under some other articles recently but did not report it back then.

  4. Anonymous said on August 25, 2023 at 11:44 am

    Omg a badge!!!
    Some tangible reward lmao.

    It sucks that redditors are going to love the fuck out of it too.

  5. Scroogled said on August 25, 2023 at 10:57 pm

    With the cloud, there is no such thing as unlimited storage or privacy. Stop relying on these tech scums. Purchase your own hardware and develop your own solutions.

    1. lollmaoeven said on August 27, 2023 at 6:24 am

      This is a certified reddit cringe moment. Hilarious how the article’s author tries to dress it up like it’s anything more than a png for doing the reddit corporation’s moderation work for free (or for bribes from companies and political groups)

  6. El Duderino said on August 25, 2023 at 11:14 pm

    Almost al unlmited services have a real limit.

    And this comment is written on the dropbox article from August 25, 2023.

  7. John G. said on August 26, 2023 at 1:29 am

    First comment > @ilev said on August 4, 2012 at 7:53 pm

    For the God’s sake, fix the comments soon please! :[

  8. Kalmly said on August 26, 2023 at 4:42 pm

    Yes. Please. Fix the comments.

  9. Kim Schmidt said on September 3, 2023 at 3:42 pm

    With Google Chrome, it’s only been 1,500 for some time now.

    Anyone who wants to force me in such a way into buying something that I can get elsewhere for free will certainly never see a single dime from my side. I don’t even know how stupid their marketing department is to impose these limits on users instead of offering a valuable product to the paying faction. But they don’t. Even if you pay, you get something that is also available for free elsewhere.

    The algorithm has also become less and less savvy in terms of e.g. English/German translations. It used to be that the bot could sort of sense what you were trying to say and put it into different colloquialisms, which was even fun because it was like, “I know what you’re trying to say here, how about…” Now it’s in parts too stupid to translate the simplest sentences correctly, and the suggestions it makes are at times as moronic as those made by Google Translations.

    If this is a deep-learning AI that learns from users’ translations and the phrases they choose most often – which, by the way, is a valuable, moneys worthwhile contribution of every free user to this project: They invest their time and texts, thereby providing the necessary data for the AI to do the thing as nicely as they brag about it in the first place – alas, the more unprofessional users discovered the translator, the worse the language of this deep-learning bot has become, the greater the aggregate of linguistically illiterate users has become, and the worse the language of this deep-learning bot has become, as it now learns the drivel of every Tom, Dick and Harry out there, which is why I now get their Mickey Mouse language as suggestions: the inane language of people who can barely spell the alphabet, it seems.

    And as a thank you for our time and effort in helping them and their AI learn, they’ve lowered the limit from what was once 5,000 to now 1,500…? A big “fuck off” from here for that! Not a brass farthing from me for this attitude and behaviour, not in a hundred years.

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