Revised and updated to include the most up-to-date information, CompTIA Security+ Study Guide, 4th Edition gives you complete coverage of the Security+ exam objectives with clear and concise information on crucial security topics. Learn from practical examples and insights drawn from real-world experience and review your newly acquired knowledge with cutting-edge exam preparation software, including a test engine and electronic flashcards. Find authoritative coverage of key exam topics like general security concepts, communication security, infrastructure security, the basics of cryptography and operational and organizational security. Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file. For Instructors: Teaching supplements are available for this title.