With the introduction in June 2007 of the new CCNA 640-802 exams, Cisco also introduced the newest versions of the InterconnectingCisco Network Devices courses (ICND1 and ICND2) course. Interconnecting Cisco Network Devices, Part 2 (ICND2), Third Edition is a Cisco authorized self-paced learning tool that helps CCNA candidates prepare for the second of these ICND courses, as well as for both the ICND2 640-816 exam as well as the new CCNA 640-802 exam. This book is the third edition of the best-selling title for early-stage CCNA preparation. It is designed in exclusive cooperation with Cisco. Coverage includes a review of the OSI model, routers and switches, Cisco IOS software, command line interface, WAN, and ISND and Frame Relay. The CCNA program certifies that a professional can install, configure, and operate LAN, WAN, and dial access services for small networks (100 nodes or fewer). It is considered one of the most valuable IT certifications, and it has been growing in popularity over the last several years