Anyone that has taken the 503 test, was your head spinning leading up to it? I am taking 503 on demand and my head is spinning when going through the labs. When you starting specifying offset and zeroing out bits and finding specifics in packet captures via wireshark and tcpdump that aren't obvious. Did anyone else have difficulty grasping this material? I'm not new to this space and have taken plenty of other tests, I didn't expect to have such a hard time with this. Also are they labs on the test does anyone know? I have about 30 days before I have to test out. I'm going through all the videos and exercises for the second time. I will then index and attempt a practice test, something tells me the index may not be as valuable for this test as it was for others I've taken, (GCIH and GMON). I appreciate any feedback.