GNS3 provides an intuitive point-and-click interface to create network topologies that consist of network devices like routers as well as hosts. GNS3 is a graphical network simulator but it actually uses emulators like Dynamips and Qemu to create software equivalents of hardware devices. GNS3 is an open source software that simulates complex networks that appear very much like real networks. You may build on the knowledge gained from this article to complete GNS3 labs provided in later articles.
You will learn how to install and configure GNS3 from scratch and how to create a network topology in GNS3. This article is the first in a series named GNS3 Labs for CCNA that covers topics in the new CCNA version 2 exams. It is an invaluable tool to prepare for Cisco certifications including CCNA (Cisco Certified Network Associate), CCNP (Cisco Certified Network Professional), and beyond. GNS3 provides an easy-to-use GUI (Graphical User Interface) to design virtual networks that behave almost like real networks.
GNS3 (Graphical Network Simulator) is a software that allows you to build complex networks without having physical routers and switches.
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