'This third edition represents another major upgrade...But it has not lost track of its larger goal, to tell you not only the facts but the why behind the facts...What this book will teach you in today's networked world will give the insight needed to work in tomorrow's landscape.' - From the Foreword by David Clark, Massachusetts Institute of Technology. In this new edition of their classic and bestselling textbook, authors Larry Peterson and Bruce Davie continue to emphasize why networks work the way they do. Their system approach treats the network as a system composed of interrelated building blocks (as opposed to strict layers), giving students and professionals the best possible conceptual foundation on which to understand current networking technologies, as well as the new ones that will quickly take their place.Incorporating instructor and user feedback, this edition has also been fully updated and includes all-new material on MPLS and switching, wireless and mobile technology, peer-to-peer networks, Ipv6, overlay and content distribution networks, and more. As in the past, all instruction is rigorously framed by problem statements and supported by specific protocol references, C-code examples, and thought-provoking end-of-chapter exercises. New to the edition is a downloadable network stimulation lab manual that allows students to visualize and experiment with core networking technologies in direct coordination with the book's discussion. Thanks to this and many other enhancements, Computer Networks: A Systems Approach remains an essential resource for a successful classroom experience and a rewarding career in networking.The Third Edition: is written by an author team with over thirty years of first-hand experience in networking research, development, and teaching - two leaders in the work of defining and implementing many of the protocols discussed in the book; includes all-new coverage and updated material on MPLS and switching, wireless and mobile technology, peer-to-peer networks, Ipv6, overlay and content distribution networks, VPNs, IP-Telephony, network security, and multimedia communications (SIP, SDP); and, contains additional and earlier focus on applications in this edition makes core protocols more accessible and more meaningful to readers already familiar with networked applications. This title features chapter-framing statements, over 400 end-of-chapter exercises, example exercises (with solutions), shaded sidebars covering advanced topics, web resources and other proven pedagogical features. A through a companion Web site provides many additional resources, including a downloadable network simulation lab manual tightly integrated with the topics in the book. This work describes the principles and practical implementation of computer networks as distilled by two authors with over thirty years of experience in networking research, development, and teaching. It includes all-new coverage and updated material on MPLS and switching, wireless and mobile technology, peer-to-peer networks, Ipv6, overlay and content distribution networks, VPNs, IP-Telephony, network security, and multimedia communications (SIP, SDP).The companion Network Simulation Experiments Manual is available with purchase of book (or can be purchased separately). The manual contains network simulation experiments that are tied closely with the contents of the book and a special academic version of the award-winning OPNET simulation software is available for download.