Dear ,

1) First tell me plz , can i measure the Bandwidth in a particular network using MRTG Graph . If it is Yes then ...

2) if i want to measure in a particular bandwidth in a particular moment then i will measure Blue & Green both bar . Then
If blue = traffic in , is traffic in is download speed ?
If green = traffic out , is traffic out is upload speed ?

And lastly , Bandwidth=traffic in +traffic Out ?


3) And the vertical Line 's unit is kB? i mean here k means "kiloByte "?

4) If i have Router and it has 2 or more network then how i measure network traffic using MRTG ? Is it as usual like switch or a different thing ?

MRTG can measure bandwidth on a particular interface. If a particular network is dedicated to an interface, than yes, it will graph traffic on a particular network. Otherwise, you will have to read the MRTG docs and find a way to script fetching the information you are looking for. No, MRTG graphs bandwidth, not speed. If you sum both graphs then divide by the total elapsed time, that will give you a measurement of speed.What else might it mean?See my response to your first question.