Solution Manual For Computer Networking A Top-Down Approach, 8th Edition by James Kurose

Computer Networking A Top-Down Approach, 8th Edition by James
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Kurose




© 2020 Pearson Education, Hoboken, NJ.


,Computer Networking: A Top-Down b b b




Approach, 8th Edition
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Solutionsto Review Questions and Problems b b b b b




Version Date: August 2020 b b b




This document contains the solutions to review questions and problems for the 8th edition
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of Computer Networking: A Top-Down Approach by Jim Kurose and
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Keith Ross. These solutions are being made available to instructors
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ONLY. b Please do NOT copy or distribute this document to others
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(even other instructors). Please do not post any solutions on a publicly-
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available Web site. We‟ll be happy to provide b a copy (up-to-date) of
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this solution manual ourselves to anyone who asks.
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Acknowledgments: Over the years, several students and colleagues have helped us prepare b b b b b b b b b b b




this solutions manual. Special thanks goes to Honggang Zhang, Rakesh
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Kumar, Prithula Dhungel, Vijay Annapureddy, Yifan Zhou. Also thanks to
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all the
b readers who have made suggestions and corrected errors.
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All material © copyright 1996-2020 by J.F. Kurose and K.W. Ross. All rights reserved
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© 2020 Pearson Education, Hoboken, NJ.


,Chapter 1 Review Questions b b b




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




systems andproducts that interoperate.
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4. 1. Dial-up modem over telephone line: home; 2. DSL over telephone
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line: home or small office; 3. Cable to HFC: home; 4. 100 Mbps
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switched Ethernet: enterprise.
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5. HFC bandwidth is shared
b among the users. bOn the b b b b b b b b b b b b b b b




downstream channel, all packets emanate from a single source, namely,
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the head end. Thus, there are no collisions in 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 b b LANs have b b b b transmission b b rates of b b b b 10 b b Mbps, b b 100 b b Mbps, b b 1 b b Gbps and
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Gbps.
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8. Today, Ethernet most commonly runs over twisted-pair copper wire. It also can
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run overfibers optic links.
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9. ADSL: up to 24 Mbps downstream and 2.5 Mbps upstream,
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bandwidth is dedicated; HFC, rates up to 42.8 Mbps and upstream rates of up
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to 30.7 Mbps, bandwidth is shared. FTTH: 2-10Mbps upload; 10-20
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Mbps download;
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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 b b b b b b b b b b b




an base station (i.e., wireless access point) within a radius of
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few tens of meters. The base station is typically connected
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the wired Internet and thusserves b to connect wireless users
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to the wired network. b b b b




b. 3G and 4G wide-area wireless access networks. In these systems, b b b b b b b b b




packets are transmitted over the same wireless infrastructure used for cellular
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telephony, with the base station thus being managed by a telecommunications
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provider. This provides wireless access to users b within a b b b b b b b b b b b b b b b b




radius of tens of kilometers of the
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© 2020 Pearson Education, Hoboken, NJ.


, 11. At time t0
b b the sending host begins to transmit. At time t1
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b L/R1, the sending host completes transmission and the entire packet is
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b received at the router (no propagation delay). Because the router has
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bthe entire packet at time t1, it can begin to transmit the
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© 2020 Pearson Education, Hoboken, NJ.