I am a college student with a full time job, looking to advance my career before I graduate. After buying these books in the first week of January 1999, I *PASSED* my Networking Essentials exam this morning (02/01) with flying colors! I have already scheduled my NT Workstation exam for 2 weeks from today, I plan to ace it as well! The books itemize every important item one by one, and the practice exams on the CDROM give an excellent prep to the actual exam, too.