Each chapter focuses on one layer of the stack along with the attacks, vulnerabilities, and exploits that can be found in that layer. This book even includes a chapter on the mythical eighth layer: The layer of people. This book is designed to give readers a deeper understanding of common vulnerabilities and the ways in which attackers exploit, manipulate, misuse, and abuse protocols and applications. What makes this book unique is that it presents the material in the layer by layer approach which offers readers a way to learn about exploits in the same way that they most likely originally learned networking. This methodology makes this book a useful tool for security professionals not only but also for networking professionals, application programmers, and others. * This book will not only provide knowledge of security tools, but will give you the ability to design a more robust security solution * Anyone can tell you what a tool does but this book shows you how the tool works