I do not know where you can get a free full version of a Cisco Simulator. You can get a good deal on a CCNA router simulator from www.amazon.com. The name of the product is CCNA(R) Router and Switch eSIM from Cisco. It only costs $62 dollars. I think it is a good deal. I had colleague use this simulator and he was very happy with it. You can also download a router simulator at www.boson.com this simulator costs $150 dollars but it covers more topics than the CCNA router and Swith eSIM. Good luck!
This was first published in July 2002