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Cybersecurity affects almost every part of modern life, from the devices we use and the networks we connect to, to the accounts, applications, and services we rely on every day. However, for someone new to the field, cybersecurity can quickly become overwhelming because of the volume of terminology, technologies, threats, and defensive techniques involved. This book introduces cybersecurity from the ground up. It begins with the fundamental ideas behind cybersecurity and computer networking before moving into threat actors, common attacks, malware, and real-world cyber incidents. From there, you will explore the technologies and practices used to defend systems, protect identities and data, secure mobile devices, improve online privacy, and apply cybersecurity principles at home and in the workplace. The emphasis throughout the book is on helping you understand not only what cybersecurity concepts mean, but also how they relate to situations you are likely to encounter in the real world. By the end of the book, you will have a broad foundation on which you can continue building your cybersecurity knowledge and skills. This book is for anyone who wants to understand cybersecurity but has little or no prior experience in the field. It is suitable for students, aspiring cybersecurity professionals, IT beginners, business professionals who want to better understand cyber risks, and everyday technology users who want to improve their security and privacy. No previous cybersecurity knowledge is required. The concepts are introduced progressively, beginning with the fundamentals before moving into attacks, defensive technologies, privacy, mobile security, and modern cybersecurity practices.