Graphical Network Simulator-3

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Graphical Network Simulator-3
GNS3 logo.png
Developer(s) Jeremy Grossmann
Written in Python
Operating system Cross-platform
Type Network simulator
License GNU GPL

Graphical Network Simulator-3 is a network software emulator first released in 2008.[1] 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[2]

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.[2]


  1. ^ a b Jameleddine Hassine, Abdelwahab Hamou-Lhadj (2014). Toward a UCM-Based Approach for Recovering System Availability Requirements from Execution Traces, in: Daniel Amyot, Pau Fonseca i Casas, Gunter Mussbacher (2014). System analysis and modeling: models and reusability: 8th International Conference, SAM 2014, Valencia, Spain, September 29–30, 2014. Lecture Notes in Cr Science 8769: 48-63. Cham: Springer. ISBN 9783319117430.
  2. ^ a b Fogarty, Susan. "GNS3 Network Simulator Raises Its Game". Network Computing. UBM Tech. Retrieved 30 May 2015. 

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