That's one thing that makes a great network administrator, it's not knowing the answer to every problem, it's knowing how to find the answer. Then you should know that you have very limited time for a question, I believe 2 minutes. So when you want to look up and take a clue, you must be very fast or knowing a lot of the stuff. The questions are not simple lookup questions, they have just as the Microsoft exams a mixup of topics. So to me the weak point of this online tests, is when you do such a test together with an experienced person.
Nobody can see who is really answering the questions.
And personally, I have abanded some Brainbench tests, they ask at such a detail level, that you really start screaming. But for me, personally, the value is questionable. I do agree with you LClark that not everyone is going to know all of this stuff off the top of their head, and the way you learn is by looking up answers. But like Dick said the questionability comes in where who is actually taking the exam or helping someone with an exam. But I was just wondering if anyone put these certs on their resume and how a potential employer looks at them.