Cisco QOS Exam Certification Guide, Second Edition is a mid- to late-stage assessment, review, and practice tool for the new IP Telephony QOS exam. It not only prepares readers to succeed on the exam, but also in their daily job as a certified networking professional. Revised to eliminate material dropped from the exam and to include new topics added, the book now also covers VPN/tunnel pre-classification, MDRR Queuing, ECN, class-based compression, and autoQoS. Coverage of all exam topics as provided by Cisco ensures readers will arrive at a complete understanding of what they need to master to pass the exam on their first attempt. The book follows a logical organization of the QOS exam objectives. Material is presented in a concise manner, focusing on increasing readers' retention and recall of exam topics. Readers will organize their exam preparation through the use of the consistent features in these chapters including pre- and post-chapter quizzes, foundation summaries and scenario-based exercises. The included CD-ROM contained with this book provides a 200-question test engine as well as an electronic version of the book.