Big data analytics provide more accurate, timely, and actionable decisions for both cybersecurity and IT management. This book gives a comprehensive coverage of state-of-the-art big data analytics in cybersecurity and IT management. The topics include threat analysis, vulnerability identification, mission analysis, network monitoring, network management, visualization, and cybertraining. Each topic is studied in detail in a case study. Edited by Dr. Onur Savas and Dr. Julia Deng, and written by leading experts from industry, academia, and government, this book will be of tremendous help for both the starters and the more experienced.