Computer Networks and Internets, Global Edition (häftad)
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Computer Networks and Internets, Global Edition (häftad)

Computer Networks and Internets, Global Edition

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Häftad Engelska, 2015-01-06
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Appropriate for all introductory-to-intermediate courses in computer networking, the Internet, or Internet applications; students need no background in networking, operating systems, or advanced mathematics.


Leading networking authority Douglas Comer presents a wide-ranging, self-contained tour of the concepts, principles, and technologies that enable todays Internet to support applications ranging from web browsing to telephony and multimedia. Comer begins by illuminating the applications and facilities offered by todays Internet. Next, he systematically introduces the underlying network technologies and protocols that make them possible. With these concepts and technologies established, he introduces several of the most important contemporary issues faced by network implementers and managers, including quality of service, Internet telephony, multimedia, network security, and network management. Comer has carefully designed this book to support both top-down and bottom-up teaching approaches. Students need no background in operating systems, and no sophisticated math: Comer relies throughout on figures, drawings, examples, and analogies, not mathematical proofs.


Teaching and Learning Experience

This program will provide a better teaching and learning experiencefor you and your students.

  • Broad Coverage of Key Concepts and Principles, Presented in a Technology-independent Fashion: Comer focuses on imparting knowledge that students will need regardless of which technologies emerge or become obsolete.
  • Flexible Organization that Supports both Top-down and Bottom-up Teaching Approaches: Chapters may be sequenced to accommodate a wide variety of course needs and preferences.
  • An Accessible Presentation that Resonates with Students: Comer relies throughout on figures, drawings, examples, and analogies, not mathematical proofs.
  • Keep Your Course Current: Content is refreshed to provide the most up-to-date information on new technologies for your course.

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Preface xxiii

PART I Introduction And Internet Applications

Chapter 1 Introduction And Overview 1

1.1 Growth Of Computer Networking 1

1.2 Why Networking Seems Complex 2

1.3 The Five Key Aspects Of Networking 2

1.4 Public And Private Parts Of The Internet 6

1.5 Networks, Interoperability, And Standards 8

1.6 Protocol Suites And Layering Models 9

1.7 How Data Passes Through Layers 11

1.8 Headers And Layers 12

1.9 ISO And The OSI Seven Layer Reference Model 13

1.10 Remainder Of The Text 14

1.11 Summary 14

Chapter 2 Internet Trends 17

2.1 Introduction 17

2.2 Resource Sharing 17

2.3 Growth Of The Internet 18

2.4 From Resource Sharing To Communication 21

2.5 From Text To Multimedia 21

2.6 Recent Trends 22

2.7 From Individual Computers To Cloud Computing 23

2.8 Summary 24

Chapter 3 Internet Applications And Network Programming 27

3.1 Introduction 27

3.2 Two Basic Internet Communication Paradigms 28

3.3 Connection-Oriented Communication 29

3.4 The Client-Server Model Of Interaction 30

3.5 Characteristics Of Clients And Servers 31

3.6 Server Programs And Server-Class Computers 31

3.7 Requests, Responses, And Direction Of Data Flow 32

3.8 Multiple Clients And Multiple Servers 32

3.9 Server Identification And Demultiplexing 33

3.10 Concurrent Servers 34

3.11 Circular Dependencies Among Servers 35

3.12 Peer-To-Peer Interactions 35

3.13 Network Programming And The Socket API 36

3.14 Sockets, Descriptors, And Network I/O 36

3.15 Parameters And The Socket API 37

3.16 Socket Calls In A Client And Server 38

3.17 Socket Functions Used By Both Client And Server 38

3.18 The Connect Function Used Only By A Client 40

3.19 Socket Functions Used Only By A Server 40

3.20 Socket Functions Used With The Message Paradigm 43

3.21 Other Socket Functions 44

3.22 Sockets, Threads, And Inheritance 45

3.23 Summary 45

Chapter 4 Traditional Internet Applications 49

4.1 Introduction 49

4.2 Application-Layer Protocols 49

4.3 Representation And Transfer 50

4.4 Web Protocols 51

4.5 Document Representation With HTML 52

4.6 Uniform Resource Locators And Hyperlinks 54

4.7 Web Document Transfer With HTTP 55

4.8 Caching In Browsers 57

4.9 Browser Architecture 59

4.10 File Transfer Protocol (FTP) 59

4.11 FTP Communication Paradigm 60