In this chapter, you have explored some of the more advanced and more difficult aspects of GNS3, but have finished with a very powerful toolkit of devices that you can add to your configurations, including Linux PCs (emulated by either Qemu or VirtualBox), Windows PCs (emulated by VirtualBox), Juniper Junos routers, and Vyatta Routers.
Your GNS3 environment is now ready to tackle some extremely diverse simulations. You may even wish to explore some of the many accompanying online exercises (available http://www.packtpub.com/sites/default/files/downloads/0809OS_Chapter) that can help with your certification goals.
The next chapter deals with matching the hardware of Cisco routers and the many variations of the Cisco IOS with the routers supported by GNS3, and how to find the right IOS with the features you need.