Failed with a score of 686!  

  14 lousy points away from slaying the beast. Did great on everything apart from DNS (mediocre) and RRAS (disaster).
I had over 40 of the "long, you want this, you do this, what have you done" type of questions, so I got desperately short of time at the end. (It takes me a few minutes to read the question sometimes, let alone work out the answer). Anyway gripe over, if at first you dont succeed etc. At least I know the two main areas I screwed up.
There was a question that really got me confused. I cant repeat the actual question/scenario here, but I think there is a basic problem in my understanding of routers Id like to ask. How can I make a router uni-directional?, i.e. allow the server side to browse the subnet, but not the subnet browse the router? What can I do to the 
router to accomplish this? Ive always thought I could just delete the subnet to server path in the router table, am I wrong?