Graphical Network Simulator-3

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Graphical Network Simulator-3
GNS3 logo.png
Developer(s)Jeremy Grossmann, Dominik Ziajka, Piotr Pękala
Initial release2008; 13 years ago (2008)
Stable release
Version 2.2.21 / 10 May 2021; 36 days ago (2021-05-10)
Repository Edit this at Wikidata
Written inPython
TypeNetwork simulator
LicenseGNU GPL

Graphical Network Simulator-3 (shortened to GNS3) is a network software emulator first released in 2008.[1][2][3] It allows the combination of virtual and real devices, used to simulate complex networks. It uses Dynamips emulation software to simulate Cisco IOS.[1]:55[4]

GNS3 is used by many large companies including Exxon, Walmart, AT&T and NASA, and is also popular for preparation of network professional certification exams. As of 2015, the software has been downloaded 11 million times.[4]


  1. ^ a b Hassine, Jameleddine; Hamou-Lhadj, Abdelwahab (29–30 September 2014). "Toward a UCM-Based Approach for Recovering System Availability Requirements from Execution Traces". In Amyot, Daniel; Pau Fonseca i Casas; Mussbacher, Gunter (eds.). System Analysis and Modeling: Models and Reusability. 8th International Conference, SAM 2014. 8769. Valencia, Spain: Springer. pp. 48–63. ISBN 9783319117430.
  2. ^ Neumann, Jason C. (2015). The Book of GNS3: Build Virtual Network Labs Using Cisco, Juniper, and More. No Starch Press. ISBN 9781593276959. gns3 book.
  3. ^ Welsh, "RedNectar" Chris (2013). GNS3 Network Simulation Guide. Packt Publishing Ltd. ISBN 9781782160816.
  4. ^ a b Fogarty, Susan. "GNS3 Network Simulator Raises Its Game". Network Computing. UBM Tech. Retrieved 30 May 2015.

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