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计算机网络 Computer Network (Fifth Edition).pdf

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    Acknowledgement
    Preface
    Contents
    Chapter 1. Basic Working Concept and System
    1.1 Concept of Communication Network
    1.2 Types of Communication
    1.3 Channels and Circuits
    1.4 Signals and Transmission
    1.5 Channel Speed and Bit Rate
    1.6 Online and Offline Systems
    1.7 Interactive and Non Interactive Systems
    Chapter 2. Communication System and Noise
    2.1 Concept of Modulation
    2.2 Amplitude Modulation
    2.3 AM Bandwidth Requirement
    2.4 Frequency Modulation
    2.5 FM Bandwidth Requirement
    2.6 Concept of Noise
    2.7 Noise Figure and Noise Temperature
    Chapter 3. Multiplexing
    3.1 Concept of Multiplexing
    3.2 Frequency Division Multiplexing
    3.3 Time Division Multiplexing
    3.4 Wavelength Division Multiplexing
    Questionnaires
    Chapter 4. Introduction to Computer Network
    4.1 Need of Computer Networks
    4.2 Advantages of Computer Networks
    4.3 Uses of Computer Networks
    4.4 Network Models
    4.5 Categories of Networks and Internetworks
    4.6 Line Configuration
    4.7 Network Topologies
    4.8 Study of Reference Models
    4.8.1 Protocol Hierarchies
    4.8.2 Design Issues for the Layers
    4.8.3 The OSI Reference Model
    4.8.4 The TCP/IP Reference Model
    4.8.5 A Comparison of the OSI and TCP Reference Models
    4.8.6 ATM
    4.9 Network Examples
    Questionnaries
    Chapter 5. Network Concept and Components
    5.1 Network Concepts
    5.1.1 Wireless Networks
    5.1.2 Layered Approach
    5.1.3 Interfaces
    5.1.4 Services
    5.1.5 Protocols
    5.1.6 Brief Study of X.25 Protocol
    5.1.7 Intranet and Extranet
    5.2 Network Components
    5.2.1 Cabling and Connector Standards
    5.2.2 Network Interface Card (NIC)
    5.2.3 Bridges/Switches
    5.2.4 Routers
    5.2.5 Concentrators
    5.2.6 Hubs
    5.2.7 Repeaters
    5.2.8 Gateways
    5.2.9 ISDN
    Questionnaries
    Chapter 6. Physical Layer
    6.1 Physical Layer Characteristics
    6.2 The Theoretical Basis for Data Communication
    6.2.1 Fourier Analysis
    6.2.2 Bandwidth Limited Signals
    6.2.3 The Maximum Date Rate of Channel
    6.3 Transmission Media
    6.3.1 Guided Media
    6.3.2 Unguided Media
    6.4 Transmission Impairment
    6.5 Design Issues of Physical Layer
    6.6 EIA-232-D Digital Interface
    6.7 EIA-232-D Interface Specifications
    6.8 Modems
    6.8.1 Introduction
    6.8.2 Types of Modems
    6.8.3 Block Schematic of a Modem
    Questionnaries
    Chapter 7. Data Link Layer
    7.1 Data Link Layer Design Issues
    7.2 Services Provided to the Nework Layer
    7.3 Framing Methods
    7.4 Error Control-Detection and Correction
    7.5 Flow Control
    7.6 Elementary Data Link Protocols
    7.7 Sliding Window Protocols
    7.7.1 Stop-and-Wait Sliding Window Protocol
    7.7.2 Sliding Window Protocol Protocol with Go-Back-N
    7.7.3 Sliding Window Protocol with Selective Repeat
    7.8 HDLC (High Level Data Link Control)
    7.8.1 Introduction
    7.8.2 Types of Stations
    7.8.3 Modes of Operation
    7.8.4 HDLC Frame Format
    7.8.5 Additional Features
    7.9 The Data Link Layer in the Internet
    7.9.1 Slip-Serial Lines IP
    7.9.2 PPP (Point-to-Point Protocol)
    Questionnaries
    Chapter 8. Medium Access Control Methods
    8.1 Channel Allocation
    8.1.1 Static Channel Allocation
    8.1.2 Dynamic Channel Allocation
    8.2 Types of Access Protocols
    8.2.1 Aloha
    8.2.2 CSMA (Carrier Sensing Multiple Access)
    8.2.3 Wavelength Division Multiple Access
    8.3 IEEE Standards
    8.3.1 IEEE 802.3: Ethernet
    8.3.2 IEEE 802.4: Token Bus
    8.3.3 IEEE 802.5: Token Ring
    8.4 High Speed Lans
    8.4.1 FDDI (Fiber Distributed Data Interface)
    8.4.2 Fast Ethernet
    8.5 Satellite Networks
    8.5.1 Polling
    8.5.2 Aloha
    8.5.3 FDM
    8.5.4 TDM
    8.5.5 CDMA
    Questionaries
    Chapter 9. Network Layer
    9.1 Design Issues
    9.2 Routing Algorithms
    9.2.1 Shortest Path Routing
    9.2.2 Flooding
    9.2.3 Flow Based Routing
    9.2.4 Distance Vector Routing
    9.2.5 Link State Routing
    9.2.6 Broadcast Routing
    9.3 Congestion
    9.3.1 Congestion Control Principles
    9.3.2 Congestion Prevention Policies
    9.3.3 Leaky Bucket Algorithms
    9.3.4 Token Bucket Algorithm
    9.3.5 Choke Packets
    9.3.6 Load Shedding
    9.3.7 Jitter Control
    Questionnaries
    Chapter 10. Internetworking
    10.1 Internetworking Devices
    10.2 Concatenated Virtual Circuits
    10.3 Connectionless Internetworking
    10.4 Tunneling
    10.5 Internetwork Routing
    10.6 Fragmentation
    10.7 Fire Walls
    10.8 TCP/IP Protocol Suit Overview
    10.8.1 TCP/IP Vs OSI Model
    10.8.2 Network Layer in the Internet
    10.8.3 Internet Protocol (IP)
    10.8.3 IP Addresses
    10.8.5 Subnetting
    10.8.6 Internet Control Protocol
    Questionaries
    Chapter 11. Transport Layer
    11.1 Service Primitives
    11.2 Elements of Transport Protocols
    11.3 TCP
    11.4 UDP
    Questionnaries
    Chapter 12. Upper Layers
    12.1 Network Security
    12.2 Cryptography
    12.3 Secret Key Algorithms
    12.4 Encryption with Public Keys and Private Keys
    12.5 Session Layer Operations and Services
    12.6 ASN.1 Abstract Syntax Notation 1
    12.7 SNMP (Simple Network Management Protocol)
    12.8 DNS (Domain Name System)
    12.9 Application Layer Services
    12.10 Study of Internet Tools
    12.10.1 E-mail
    12.10.2 USENET News
    12.10.3 WWW (World Wide Web)
    12.10.4 HTTP (Hyper Text Transfer Protocol)
    12.10.5 HTML (Hyper Text Markup Language)
    Appendix A
    Appendix B
    Appendix C
    Appendix D
    Appendix E
    Appendix F
    Appendix G
    Glossary
    Index
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    Copyright © 2009, New Age International (P) Ltd., Publishers Published by New Age International (P) Ltd., Publishers All rights reserved. No part of this ebook may be reproduced in any form, by photostat, microfilm, xerography, or any other means, or incorporated into any information retrieval system, electronic or mechanical, without the written permission of the publisher. All inquiries should be emailed to rights@newagepublishers.com ISBN (13) : 978-81-224-2852-0 PUBLISHING FOR ONE WORLD NEW AGE INTERNATIONAL (P) LIMITED, PUBLISHERS 4835/24, Ansari Road, Daryaganj, New Delhi - 110002 Visit us at www.newagepublishers.com
    ACKNOWLEDGEMENT It gives me a great pleasure in bringing out this book on COMPUTER NETWORK which covers most of the concepts from computer and communication network. I would like to warmly thank my parents, my husband Mr. Sunil Shinde for providing advice, encouragement and support at various stages of the preparation of this book. I also thank them for reminding us that there are things in life beyond writing books. I am very much thankful to Principal and Management of Annasaheb Dange College of Engineering and Technology, Ashta, for their encouragement and moral support. Finally I thank to all staff of New Age Intertions, Publishes for essential support throughout the arduous process of getting the book into print. I welcome any constructive criticism of the book and will be grateful for any appraisal by the readers. SUNITA S. SHINDE (ix)
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    PREFACE Unlike the other computer networking books, this book is organized in a bottom-up manner, i.e., it begins at the physical layer and works its way down towards the application layer. The bottom-up approach has several important benefits. 1. It places emphasis on the physical layer, which has been the high"growth area" of hardware and computer networking and communication. Also at top layer, indeed, many of the recent revolutions in computer networking. In preparing the first edition of this book, we believed that the application layer would remain the highest growth area in the field, both in terms of research and actual deployment. 2. Our experience as instructor has been that teaching networking applications near the beginning of the course is a powerful motivational tool. Students are thrilled to learn about how networking applications work- application such as e-mail and the Web which most students use on a daily basis. 3. The bottom-up approach enables instructors to introduce network hardware development at an early stage. Students not only see how popular applications and protocols work, but also learn how easy it is to create their own network applications and application-level protocols. Thus, with the bottom-up approach, students get early exposure to the notions of hardware programming interfaces(APIs), service models, protocols, and other important concepts. The chapter by chapter description of the book is as follows: Chapter 1: This chapter describes basics of communication networks. Chapter 2: This chapter describes modulation techniques and concepts of noise. Chapter 3: This chapter describes about multiplexing techniques. Chapter 4: This chapter explains introduction to computer networks. Chapter 5: This chapter focuses on different network concepts and components. Chapter 6: This chapter describes the physical layer structure and it covers theoretical basis for data communication, about transmission media, RS-232, and about modem. (vii)
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