COMPLETE TEST BANK: computer networking: a top-down approach 7th edition by james kurose (author)latest update.

,ComputerNetworking: A Top-Down Approach,
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7th Edition
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Solutions to Review Questions and Problems
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,Version Date: December 2016 ff f ff




This document contains the solutions to review questions and problems for the 7th
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edition of Computer Networking: A Top-Down Approach by Jim Kurose and Keith Ross.
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These solutions are being made available to instructors ONLY. Please do NOT copy or
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distribute this document to others (even other instructors). Please do not post any
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solutions on a publicly-available Web site. We‟ll be happy to provide a copy (up-to-date)
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of this solution manual ourselves to anyone who asks.
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Acknowledgments: Over the years, several students and colleagues have helped us ff ff ff ff ff ff ff ff ff ff



prepare this solutions manual. Special thanks goes to Honggang Zhang, Rakesh Kumar,
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Prithula Dhungel, and Vijay Annapureddy. Also thanks to all the readers who have made
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suggestions and corrected errors.
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All material © copyright 1996-2016 by J.F. Kurose and K.W. Ross. All rights reserved
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, Chapter 1 Review Questions ff ff ff




1. There is no difference. Throughout this text, the words “host” and “end system” are
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used interchangeably. End systems include PCs, workstations, Web servers, mail
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servers, PDAs, Internet-connected game consoles, etc.
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2. From Wikipedia: Diplomatic protocol is commonly described as a set of international
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courtesy rules. These well-established and time-honored rules have made it easier for
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nations and people to live and work together. Part of protocol has always been the
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acknowledgment of the hierarchical standing of all present. Protocol rules are based
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on the principles of civility.
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3. Standards are important for protocols so that people can create networking systemsff ff ff ff ff ff ff ff ff ff ff



and products that interoperate.
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4. 1. Dial-up modem over telephone line: home; 2. DSL over telephone line: home or
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small office; 3. Cable to HFC: home; 4. 100 Mbps switched Ethernet: enterprise; 5.
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Wifi (802.11): home and enterprise: 6. 3G and 4G: wide-area wireless.
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5. HFC bandwidth is shared among the users. On the downstream channel, all packets
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emanate from a single source, namely, the head end. Thus, there are no collisions in
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the downstream channel.
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6. In most American cities, the current possibilities include: dial-up; DSL; cable
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modem; fiber-to-the-home.
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7. Ethernet LANs have transmission rates of 10 Mbps, 100 Mbps, 1 Gbps and 10 Gbps.
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8. Today, Ethernet most commonly runs over twisted-pair copper wire. It also can run
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over fibers optic links.
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9. Dial up modems: up to 56 Kbps, bandwidth is dedicated; ADSL: up to 24 Mbps
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downstream and 2.5 Mbps upstream, bandwidth is dedicated; HFC, rates up to 42.8
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Mbps and upstream rates of up to 30.7 Mbps, bandwidth is shared. FTTH: 2-10Mbps
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upload; 10-20 Mbps download; bandwidth is not shared.
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10. There are two popular wireless Internet access technologies today:
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a) Wifi (802.11) In a wireless LAN, wireless users transmit/receive packets to/from an
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base station (i.e., wireless access point) within a radius of few tens of meters. The
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base station is typically connected to the wired Internet and thus serves to connect
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wireless users to the wired network.
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b) 3G and 4G wide-area wireless access networks. In these systems, packets are
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transmitted over the same wireless infrastructure used for cellular telephony, with the
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