I am a student CCNA. I work for quitte a time in Amsterdam University Medical Center as a datacenter engineer. I am really happy that I came in contact with Network Lessons. The information on this website of Rene Molenaar is superb and I like the way he presents the courses. Besides Network lessons I make use of the also very good courses of Neil Anderson and Jeremy McDowell and Wendell Odom. Last but not least the Cisco websites are a great source of information. For the labs I use GNS3, CML, Packet Tracer and at the moment I am looking at EVE-GN, which is a good alternative for GNS3. At the moment CML is my favorite emulator. My goal is to pass the CCNA exam and continu with CCNP.