<p><strong>GNS3</strong> is a graphical network simulator that allows simulation of complex networks.</p> 

<p>To allow complete simulations, GNS3 is strongly linked with:</p> 
<ul> 
	<li>Dynamips, the core program that allows Cisco IOS emulation</li> 
	<li>Dynagen, a text-based front-end for Dynamips</li> 
	<li>Qemu, a generic and open source machine emulator and virtualizer</li> 
	<li>GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP, CCIE, JNCIA, JNCIS, JNCIE</li> 
</ul> 

<h5>Features:</h5> 
<ul> 
	<li>Design of high quality and complex network topologies</li> 
	<li>Emulation of many Cisco IOS router platforms, IPS, PIX and ASA firewalls, JunOS</li> 
	<li>Simulation of simple Ethernet, ATM and Frame Relay switches</li> 
	<li>Connection of the simulated network to the real world! 
	<li>Packet capture using Wireshark</li> 
	<li>Important notice: users have to provide their own IOS/IPS/PIX/ASA/JunOS to use with GNS3</li> 
</ul>

GNS3 Technologies Inc.

Absolutely Free

GNS3

Graphical network simulator that allows simulation of complex networks.

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GNS3: 2.1.17 - 0.8.7