CompTIA A+ Certification All-in-One Exam Guide, Ninth Edition (Exams 220-901 & 220-902) is a comprehensive resource authored by the leading authority in CompTIA A+ certification. Fully revised for the 2015 exam objectives, this book covers all aspects of exams 901 and 902 with detailed, up-to-date information. New topics include managing and maintaining cellular devices such as tablets; configuring operating systems like Windows 8, Android, and iOS; and advanced security and troubleshooting practices centered around mobile technology. This All-in-One guide is designed to help you prepare thoroughly for the exams, while also serving as a valuable reference for IT professionals in support roles. With its extensive coverage of 1473 pages, it equips readers with all necessary knowledge to succeed in their certification journey.