Computer Networks and Internets

by Comer, Douglas E.

• ISBN13: 9780131433519
• ISBN10: 0131433512
• Edition: 4th
• Format: Hardcover
• Copyright: 2009-01-01
• Publisher: Prentice Hall

Summary

For one-semester, undergraduate/graduate introductory computer networking courses in Computer Science, Electrical Engineering, CIS, MIS, and Business Departments. Written by a best-selling author and leading computer networking authority, this text builds a comprehensive picture of the technologies behind Internet applications. Ideal for those with little or no background in the subject, the book answers the basic question how do computer networks and Internets operate? in the broadest sense and includes an early optional introduction to network programming and applications. The text provides a comprehensive, self-contained tour through all of networking from the lowest levels of data transmission and wiring to the highest levels of application software, explaining how underlying technologies provide services and how Internet applications use those services. At each level, it shows how the facilities and services provided by lower levels are used and extended in the next level. For instructors who want to emphasize Internet technologies and applications, the book provides substantial sections on Internetworking and Network Applications that can serve as a focus for a course. An accompanying multimedia CD-ROM and Website provide opportunities for a variety of hands-on experiences.

Table of Contents

Using and Building Internet Applications

Introduction

Motivation and Tools

Network Programming and Applications

Data Transmission

Transmission Media

Local Asynchronous Communication RS-232

Long-Distance Communication Carriers, Modulation, and Modems

Packet Transmission

Packets, Frames, and Error Detection

LAN Technologies and Network Topology

Hardware Addressing and Frame Type Identification

LAN Wiring, Physical Topology, and Interface Hardware

Extending LANs: Fiber Modems, Repeaters, Bridges, and Switches

Long-Distance and Local Loop Digital Connection Technologies

WAN Technologies and Routing

Connection-Oriented Networking and ATM

Network Characteristics: Ownership, Service Paradigm, and Performance

Protocols and Layering

Internetworking

Internetworking: Concepts, Architecture, and Protocols

IP: Internet Protocol Addresses

Binding Protocol Addresses ARP

IP Datagrams and Datagram Forwarding

IP Encapsulation, Fragmentation, and Reassembly

The Future IP IPv6

An Error Reporting Mechanism (CMP)

UDP: Datagram Transport Service

TCP: Reliable Transport Service

Network Address Translation

Internet Routing

Network Applications

Client-Server Interaction

The Socket Interface

Example of a Client and a Server

Naming with the Domain Name System

Electronic Mail Representation and Transfer

IP Telephony VoIP

File Transfer and Remote File Access

World Wide Web Pages and Browsing

Dynamic Web Document Technologies CGI, ASP, JSP, PHP, ColdFusion

Active Web Document Technologies Java, JavaScript

RPC and Middleware

Network Management SNMP

Network Security

Initialization Configuration

Glossary of Net

Table of Contents provided by Publisher. All Rights Reserved.

Excerpts

Previous editions ofComputer Networks And Internetshave generated excitement. In addition to the hundreds of U.S. schools using the text in their networking courses, professionals have written to praise its use in industry, and enthusiastic comments have arrived about the foreign translations. The success is especially satisfying in a market glutted with networking books. This book stands out because of its breadth of coverage, logical organization, explanation of concepts, focus on the Internet, and wealth of supplemental materials for both students and instructors on the CD-ROM and on the Web site: http://www.netbook.cs.purdue.edu The new edition has been completely revised and updated, with three new chapters (24, 26, 33) and additional glossary entries. The CD-ROM and Web site have also been expanded. Each new chapter responds to requests from instructors and readers. Chapter 24 introduces UDP, Chapter 26 explains Network Address Translation, and Chapter 33 covers IP telephony. Chapter 33 is especially relevant; students are likely to use an IP telephone. The text answers the basic question "how do computer networks and internets operate?" in the broadest sense. It provides a comprehensive, self-contained tour through all of networking that describes low-level details such as data transmission and wiring, network technologies such as LANs and WANs, internetworking protocols, and application software. It shows how protocols use the underlying hardware and how applications use the protocol stack to provide functionality for users. Much has been written recently about how a study of networking should be organized. There are two extremes: a strict bottom-up approach or a strict top-down approach. In bottom-up, one learns the lowest-level details, and then learns how the next higher levels use the lower-levels to provide expanded functionality. In top-down, one starts with a high-level application and only learns enough of the next lower layer to understand how the application can operate. Each approach has advantages. The traditional bottom-up approach presents the material in a logical manner so a reader understands how higher layers build on lower layers. A top-down approach begins with familiar applications (e.g., email), and provides a less rigorous introduction to the subject. We recommend a new, integrated approach that combines the best of top-down and bottom-up. The integrated approach provides early exposure to using and building network applications while simultaneously delivering the material in a logical order. To implement the integrated approach, the new edition ofComputer Networks And Internetshas a companion laboratory manual,Hands-On Networking.Computer Networks And Internetsexplains the concepts, and the exercises in Hands-On Networking show how the concepts apply to real networks. The text is intended for upper-division undergraduates or beginning graduate students, who have little or no background in networking. It does not use sophisticated mathematics, nor does it assume a knowledge of operating systems. Instead, the text defines concepts clearly, uses examples and drawings to illustrate how the technology operates, and states results of analysis without providing mathematical proofs. After an introduction that starts readers using and building network applications (Chapters 1-3), the body of the text is organized into four sections. The first section (Chapters 4-6) provides a brief explanation of how the underlying hardware works. The section explains the concept of a carrier signal, discusses modulating a carrier, and shows how a modem encodes data on a carrier wave for transfer. The section also discusses asynchronous, character-oriented data transmission, and defines terms such asbandwidthandbaudthat arise in later chapters. The second section (Chapters 7-1