This is the eBook version of the print title. Note that the eBook does not provide access to the practice test software that accompanies the print book. Access to the Network Simulator Lite and personal video mentoring is available through product registration at Cisco Press - or see instructions in back pages of your eBook. The new edition of bestselling CCENT/CCNA ICND1 640-822 Official Cert Guide, Third Edition by Wendell Odom has been updated to refresh the content, add new exercises, and enhance certain topics that are key to understanding for success on the CCENT and CCNA exams. The IP addressing topics have been rewritten and re-organized to mirror proven techniques to learn both the concepts and the specific pieces of the subnetting puzzle. In addition, the TCP/IP and OSI Networking Models chapter was also completely updated and rewritten. Learn, prepare, and practice for exam success Master CCENT/CCNA ICND1 exam topics Assess your knowledge with chapter-opening quizzes Review key concepts with exam preparation tasks Learn from 60 minutes of Video mentoring Apply concepts within Network Simulator lab exercises CCENT/CCNA ICND1 640-822 Official Cert Guide, Third Edition is a best of breed Cisco exam study guide. Best-selling author and expert instructor Wendell Odom shares preparation hints and test-taking tips, helping you identify areas of weakness and improve both your conceptual knowledge and hands-on skills. The book presents you with an organized test preparation routine through the use of proven series elements and techniques. The master table of exam topics makes referencing easy. “Do I Know This Already?” quizzes open each chapter and enable you to decide how much time you need to spend on each section. Chapter-ending Exam Preparation Tasks help you drill on key concepts you must know thoroughly. A final preparation chapter guides you through tools and resources to help you craft your final study plan. Special troubleshooting sections help you master the complex scenarios you will face on the exam.