Cisco IOS emulator

Does anyone know of a decent cisco ios emulator where you can practice the majority of commands. Couple emulators that I played around with support only a handful of major commands, i'm looking for an emulator that would let me try out a much bigger number of cisco commands and options.

Thanks.

Boson Router Simulatore is good

i play with boson netsim v5.27 :lol:

i agree that boson is good , but u need to pay for the full version .....now now .. i am not advising you to go around lookin for cracks coz you wont find any for the latest versions....folks at boson have become smart , if you are lookin for some router practice , check out www.r1r2.com