router simulator (3 products)

Boson CCNA Router Simulator 5.0 (Demo, $249.95)

"Create your own simulated network and configure Cisco simulated devices, including various routers, switches, and workstations, using the Boson Router Simulator. Free upgrades and support for 60 days on previously brought beta NetSim versions, PLUS a 100% money-back guarantee on all Boson products, make this a no-risk purchase. The free demo version is available now and can be registered for only $249.95, with quantity discounts available. This product is also a great CCNA router simulator to help those in becoming a CCNA."

Cisco CCNA Exam (640-801) Router Simulator : Sem 2.2.1 (Shareware, $29.00)

Award winning Cisco CCNA exam

Network Visualizer - CCNA Network Simulator 4.0 (Demo, $199.00)

RouterSim Network Visualizer 4.0 is a CCNA network simulator that allows you to design, build and configure your own network with drag and drop design. Use unlimited devices, 432 commands and work with 233 supported labs in building your virtual networks. You can also design, create, and configure your own virtual networks. This feature rich program was best in show in recent competition at Networld+Interop 2004 in Tokyo.