CCNA Guide to Cisco Networking Fundamentals, 4th Edition
"Getting down to brass tacks on Networking fundamentals is no easy task.  There's just so much to learn and to assimilate.  Ric Smolenki's book goes a long way to helping to introduce people to a very complex world.  I can't wait to see the latest edition and use it to help my students." - Chris Ward, Sr. Technical Instructor