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Network Simulation with GNS3

The GNS3 network simulator is a convenient open source tool for the design and simulation of Cisco-based networks.

By Holger Reibold

Updated Nov 3, 2026 10:40 AM / Published Apr 13, 2019 3:00 AM 10 min read

Fancy sandcastle. — Lead Image © Joseasreyes, 123RF.com

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Holger Reibold

Holger Reibold is a computer scientist, who has worked as an IT journalist since 1995. Currently, he works as a key account manager for a German ISP. His main interests are open source tools and security topics.