This is the only Cisco-authorized companion guide to the official Cisco Networking Academy course in the new CCNA Routing and Switching curriculum. An invaluable resource for hundreds of thousands of Cisco Networking Academy students worldwide, this portable desk reference is ideal for anytime/anywhere take-home study and reference. Fully aligned to the online course chapters, it offers additional book-based pedagogy to reinforce key concepts, enhance student comprehension, and promote retention. Using it, students can focus scarce study time, organize review for quizzes and exams, and get the day-to-day reference answers they're looking for. The Companion Guide also offers instructors additional opportunities to assign take-home reading or vocabulary homework, helping students prepare more for in-class lab work and discussions.