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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.

Matt
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user114298
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  • possible duplicate of [Application to help build diagrams](http://superuser.com/questions/67536/application-to-help-build-diagrams) – slhck Mar 16 '12 at 10:12
  • [Tool to create architectural overview diagrams](http://superuser.com/questions/18020/tool-to-create-architectural-overview-diagrams/18029#18029), [Cross platform diagramming tool](http://superuser.com/questions/216191/cross-platform-diagramming-tool/216246#216246) – slhck Mar 16 '12 at 10:13
  • 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](http://en.wikipedia.org/wiki/List_of_vector_graphics_editors#General_information), sort by license. – slhck Mar 16 '12 at 13:23
  • @slhck Yes, I already checked out yEd. – user114298 Mar 16 '12 at 13:26

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

  • inkscape
  • dia
RedGrittyBrick
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