The updated edition of the official self-study test preparation guide for the CCIE Routing and Switching written exam v4.0 * *CCIE Routing and Switching exam is the most popular CCIE exam track, representing almost 80% of all CCIEs. *The new edition aligns with all the topics covered in the CCIE Routing and Switching written exam as updated August 2009. *Includes tools to help readers remember the most important details for the exam. The CCIE Routing and Switching certification is the most respected certification in the industry. The successful CCIE candidate must understand a broad range of network technologies that includes OSI model, bridging, LAN switching, IP and IP Routing protocols, multicast, WAN technologies, and performance management. The exam is notoriously difficult and CCIE candidates must first pass a qualifying written exam. The CCIE Routing and Switching Exam Certification Guide, 4/e, covers all of the topics of the 4.0 written exam. In this updated edition there are content and alignment changes based on the revised v4.0 exam. The newest edition includes 300 pages of new content covering the following topics: * *Network optimization. *Troubleshooting. *BGP routing policies. *Expanded QoS coverage. *Expanded WAN coverage. *Expanded multicast coverage. *Expanded MPLS coverage. *IPv6 redistribution. This book also contains all the elements and features of the best-selling Exam Certification Guide series. These elements include specially designed assessment and study features, such as 'Do I Know This Already?' quizzes that assess readers' knowledge and help them decide how much time to spend on each section, Foundation Summary sections that highlight essential concepts for quick reference, and End-of-chapter questions to quiz readers.