This series is also an excellent source of career continuation training, and a solid on-the-job reference. A network engineer is alot like a medical doctor. There is a great deal of information to know, there is a requirement to be continually learning and advancing your mind, but there is also a time when you need good references. A successful doctor has a broad range of knowledge, but knows when and how to call in a specialist for a particularly difficult case. Similarly, a CCNA will need a reference that he or she can rely on. This video series is your "referral to a specialist". When you don"t feel comfortable with a particular area of deployment or maintenance, just pop in the 30-minute video covering that concept and implementation and you"re ready to go.