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What software is good for modeling network architecture?

Essentially, I want to do this:

enter image description here

With what software could this be achieved? I need a free or open source solution. I don't need to do a network simulation, just a simple representations tool with nice graphical representation would do the job.

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closed as not constructive by slhck, Dave M, random Mar 16 '12 at 20:41

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possible duplicate of Application to help build diagrams – slhck Mar 16 '12 at 10:12
I think that those do not refer exclusively to free or open source. – user114298 Mar 16 '12 at 13:05
@Matt Thanks for putting the image in, since I couldn't. – user114298 Mar 16 '12 at 13:09
No, but I'm sure you easily pick a few. See also: Comparison of vector graphics editors, sort by license. – slhck Mar 16 '12 at 13:23
up vote 1 down vote accepted

If you just want an open-source diagramming tool, there are many. The ones that immediately come to my mind are

  • inkscape
  • dia
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Thanks! I already knew, but forgot, about dia. Does inkscape come with network diagram images? – user114298 Mar 16 '12 at 13:01

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