Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Often in network monitoring tools there are three values for one measure.


rx: 2.0 kb/s 40 kb/s 10 kb/s

Are these similar to how cpu load works, they are taken at different length time spans. So one is every two seconds, then four seconds..

Thanks in advance.

One example program would be iftop.

share|improve this question
up vote 4 down vote accepted

Generally speaking, you can't asume the output of different tools have the same meaning. You have to RTM.

Specifically, these three columns in iftop are the average traffic during the last 2, 10 and 40 seconds.

Some similar output on another software could mean something else (like, minimum, average and maximum).

share|improve this answer

In iftop at least, these are the receive values at 2,10, and 40 second intervals. The tx row is the same for transmit. Different programs may have different intervals.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.