Only Authorized Textbook for the Cisco Networking Academy Program Additional chapters, not found in the Web-based curriculum, including tips, housing network, and moreCompanion CD-ROM contains exclusive enrichment materials such as e-Lab interactive activities, animations, and CCNA preparation questions that prepare you for the practical part of the CCNA examChapter purpose of providing reference to the concepts covered in each question chapterReview at the end of each chapter help track your progress and focus your studyNew Command Summary add your understanding of the command used to configure Cisco routers and references to chapters in which each command appearsMaterial covered in this book helps you prepare for CCNA Exam # 640-507 Cisco Networking Academy Program: First-Year Companion Guide, Second Edition is a Cisco-approved books for first and second semesters of the Cisco Networking Academy Program. This book supports and strengthens Web-based curriculum for Cisco Networking Academy Program, while strengthening the concepts related to CCNA certification.