70-291 Exam Looms

I'm going to be taking the MCSE/MCSA/MCP Exam 70-291 in the next two weeks. I did a practice test today and got 75%. I'm thinking I guessed a few correctly. Apparently I'm weak on DNS. I didn't think so, but I'm going to read up on it a fair bit anyways. I'm concerned more about my RRAS knowledge than I am about DNS, so I'll take a look at both.