ts8586,
Yes it is in a limited way but realisticly the sims are basic enough that if you need to use "help" you are not ready to take the CCNA exam!
You have got to spend lots of time on a rack of routers or on a good sim and understand the IOS like the back of your hand - or at least the amount of the IOS covered in any good CCNA study guide!
Hope this helps!
E.A. Broda
CCNA, CCDA, CCAI, Network +