This work helps students prepare for the CCNA (Cisco Certified Network Associate) exam, one of the most popular entry-level certifications for networking professionals and one that often translates into a salary increase. According to the U.S. Bureau of Labor Statistics, general networking/system administration jobs are expected to increase more than eighty percent by 2010. This revision includes updates for the exam's new routing simulation, plus updated and more extensive information about WANs. In addition to the Dummies Test Engine, an exclusive, fully customizable test-prep software package containing hundreds of sample questions based on the tone and content of the actual exam, the accompanying CD-ROM contains the Boson Routing Simulator to prepare students for this newest feature of the exam. Author is the former director of a Cisco Regional Training Academy.