The Cisco Certified Network Associate (CCNA) certification is the first-tier certification in Cisco's Network Support and Communications & Services tracks and by far its most popular. Cisco continues to add new questions to the item pool, thus making it even more necessary for courseware providers to keep their content up to date. This 5th edition provides general updates that reflect technology developments over the past year, and offers expanded coverage on key topics reflected in the current version of the exam.