CCIE Routing and Switching Official Exam Certification Guide, Second Edition, is a best of breed CiscoR exam study guide that focuses specifically on the objectives for the CCIER Routing and Switching written exam. Senior instructor and best-selling author Wendell Odom shares preparation hints and test-taking tips, helping you identify areas of weakness and improve your routing and switching knowledge. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics.