""WAN Technologies CCNA 4 Companion Guide": The only authorized Companion Guide for the Cisco Networking Academy Program" - Allan Reid. "WAN Technologies CCNA 4 Companion Guide" is the official supplemental textbook for version 3.1.1 of the CCNA[registered] 4 course in the Cisco[registered] Networking Academy[registered] Program. The author has completely rewritten the Companion Guide to provide a fresh, complementary perspective on the online course content. The book covers all the topics in the course and then provides additional examples and alternative approaches to individual topics - all to aid the learning process and lock in your understanding of basic networking concepts and technologies. New and improved features help you study and succeed in this course: Chapter objectives - review core concepts by answering the questions at the beginning of each chapter; Key terms - refer to the updated lists of networking vocabulary introduced in each chapter and turn to the highlighted terms in context; Glossary - consult the all-new glossary with more than 300 terms; Check Your Understanding questions and answer key - Evaluate your readiness with the updated end-of-chapter questions that match the style of questions that you see in the online course assessments. The answer appendix explains each answer; and, Challenge questions - Challenge yourself with review questions designed to be similar to the complex questions you might see on the CCNA exam. The answer appendix explains each answer. Allan Reid is the curriculum lead for CCNA and a CCNA / CCNP[registered] instructor at Centennial College CATC in Toronto, Canada. He has been teaching the CCNA curriculum to both students and instructors since CCNA version 1.1 and has been instrumental in the development and implementation of numerous certificate, diploma, and degree programs in networking. Outside of his academic responsibilities, Allan has been active in the computer and networking fields for more than 25 years and is currently a principle in a company involved in the design, installation, and management of network solutions for small and medium-sized businesses. Packet Tracer Activities provide: help to create simulated networks and visualize how packets flow in the network using Packet Tracer v3.2 developed by Cisco Systems[registered]; Lab References - stop when you see this icon and perform the related labs from the online curriculum; Brand new Comprehensive Labs and Challenge Labs - look for these labs and study materials in the supplementary book "WAN Technologies CCNA 4 Labs and Study Guide" by John Rullan (ISBN: 1-58713-173-0). Companion CD-ROM - The CD-ROM includes: Additional Topics of Interest: Beneficial to becoming a well-rounded networker Interactive Media; Activities: More than 25 activities that visually demonstrate key topics; Packet Tracer v3.2: A Flash-based simulation and visualization learning tool. Student Resources on the Web Cisco Press provides additional content that you can access by registering your book at ciscopress.com. Membership and registration are free and give you access to Packet Tracer configuration files, additional content from Cisco Press books, and exclusive deals on other resources from Cisco Press. This book is part of the "Cisco Networking Academy Program Series" from Cisco Press[registered]. The products in this series support and complement the Cisco Networking Academy Program online curriculum.