Graphical Network Simulator-3

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Graphical Network Simulator-3
Developer(s)Jeremy Grossmann, Dominik Ziajka, Piotr Pękala
Initial release2008; 15 years ago (2008)
Stable release
2.2.36[1]Edit this on Wikidata / 4 January 2023; 26 days ago (4 January 2023)
Written inPython
TypeNetwork simulator
LicenseGNU GPL

Graphical Network Simulator-3 (shortened to GNS3) is a network software emulator first released in 2008.[2][3][4] It allows the combination of virtual and real devices, used to simulate complex networks. It uses Dynamips emulation software to simulate Cisco IOS.[2]: 55 [5]

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.[5]


  1. ^ "Release 2.2.36". 4 January 2023. Retrieved 12 January 2023.
  2. ^ 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. Vol. 8769. Valencia, Spain: Springer. pp. 48–63. ISBN 9783319117430.
  3. ^ Neumann, Jason C. (2015). The Book of GNS3: Build Virtual Network Labs Using Cisco, Juniper, and More. No Starch Press. ISBN 9781593276959. gns3 book.
  4. ^ Welsh, "RedNectar" Chris (2013). GNS3 Network Simulation Guide. Packt Publishing Ltd. ISBN 9781782160816.
  5. ^ a b Fogarty, Susan. "GNS3 Network Simulator Raises Its Game". Network Computing. UBM Tech. Retrieved 30 May 2015.

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