On my Windows 7 Platform - List item Type at the Windows 7 search bar Network and Sharing Center. Select - Network and Sharing Center Change Adapter Settings Right Click ( The LAN Lannetwrk Adapter) select Status it will show you the speed you have negotiated with the next network device up stream.

How can I test the speed of a LAN? I hope there is something baked into Windows to do this, because I am unable to install any third-party products.

To troubleshoot a network problem I would like to inquire the real network "speed" for a given network adapter, which can be seen when opening the "status" of a network connection under Windows: Ho...

The only way to test the entire home network without expensive software or hardware is to take your laptop and plug it directly into each router, hub, and switch, and run a speed test through each one. The bandwidth you get on the speed test also depends on how much of the Internet in your home is currently in use.

We've performed numerous test and it boiled down to the Operating System. If we go from Ubuntu 11.04 to Ubuntu 11.04 (same with CentOS for Linux machines), the speed throughput is ~938-941 MBits/s constant. If we go from Windows 7 x64 SP1 Ultimate to Ubuntu 11.04, it varies from ~440-475 MBits/s.

I ran my Internet connection through SpeedTest.net which claims that it finds out the actual Internet speed, much lower than that promised by my ISP. But—while downloading—the speed is much lesser than the test results. Even after using download mangers like Internet Download Manager, there isn’t much difference.

Ideally always test with a wired connection to limit factors (wifi interference). Here is a few steps i would do in order to find the problem and test network speed: First, make sure that the links between your NAS and network is correctly beeing displayed as gigabit and that your cable are OK.

Is there any way to measure precisely bandwidth between two computers in a LAN?

Another difference between speedtest, and the speed from a server you're downloading from is distance, latency, etc. Speedtests always pick a server that is closest to you in order to give you the best results. A speedtest simply measures the download between you and your ISP. It doesn't actually go out beyond your ISP.

I can speed test both locations of course, but that isn't necessarily representative of the actual throughput between the two points. Given the different ISP's and service speeds, I imagine I'd get different results depending on which end I test from. One connection has 3x the upload speed making it the better server end I believe.