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This textbook on computer networks follows a top-down approach. It is designed to help students understand the basics of networking in general and the protocols used in the Internet, in particular.The presentation begins with an explanation of the application layer, which makes it easier for students to understand how network devices work, and then, with the students fully engaged, the authors move on to discuss the other layers, ending with the physical layer. With this top-down approach, its thorough treatment of the topic, and a host of pedagogical features, it offers a well-crafted, modern text that places the student at the center of the learning experience.Numerous figures and examples provide multiple routes to understanding and the students are encouraged to view what they are learning in a real-world context. This approach is both motivating and practical in that students begin to see themselves as the professionals they will soon become.Salient Features:1.Follows a Top-Down approach.2.Visual approach with 650+ images and flow-charts.3.Real life examples and exercises.4.Rich end-of-chapter exercises for practice.