This book provides the basic information you need to understand the basics of the area, identify your place within it and start the security certification path. Cybercity provides a broad introduction to the field, with specialist coverage of the essential subjects required for entry-level cyber security certificate. There are four different challenges in an effective defense: securing the infrastructure, securing the equipment, securing the local network and securing the periphery. To overcome these challenges, a broad understanding of concepts and practices within each region is required. This book covers each challenge individually for a greater depth of information with the world's scenarios, which shows what weaknesses in computing scenarios look like every day. Each part ends with a summary of key concepts, review questions and practice on hands, so that you can test your understanding while practicing your important skills.