TCP/IP For Dummies

Packed with the latest information on TCP/IP standards and
protocols

TCP/IP is a hot topic, because it's the glue that holds the
Internet and the Web together, and network administrators need to
stay on top of the latest developments. TCP/IP For Dummies, 6th
Edition, is both an introduction to the basics for beginners as
well as the perfect go-to resource for TCP/IP veterans.

The book includes the latest on Web protocols and new hardware,
plus very timely information on how TCP/IP secures connectivity for
blogging, vlogging, photoblogging, and social networking.
Step-by-step instructions show you how to install and set up TCP/IP
on clients and servers; build security with encryption,
authentication, digital certificates, and signatures; handle new
voice and mobile technologies, and much more.

• Transmission Control Protocol / Internet Protocol (TCP/IP) is
  the de facto standard transmission medium worldwide for
  computer-to-computer communications; intranets, private internets,
  and the Internet are all built on TCP/IP

• The book shows you how to install and configure TCP/IP and its
  applications on clients and servers; explains intranets, extranets,
  and virtual private networks (VPNs); provides step-by-step
  information on building and enforcing security; and covers all the
  newest protocols

• You'll learn how to use encryption, authentication, digital
  certificates, and signatures to set up a secure Internet credit
  card transaction

Find practical security tips, a Quick Start Security Guide, and
still more in this practical guide.

Auteur

Candace Leiden consults on systems and database performance
and instructional design for international courseware.

Marshall Wilensky was a consultant and network manager
for multiprotocol networks at Harvard University's Graduate School
of Business Administration. Both are internationally known
speakers.

Résumé
Packed with the latest information on TCP/IP standards and protocols TCP/IP is a hot topic, because it's the glue that holds the Internet and the Web together, and network administrators need to stay on top of the latest developments. TCP/IP For Dummies, 6th Edition, is both an introduction to the basics for beginners as well as the perfect go-to resource for TCP/IP veterans.

The book includes the latest on Web protocols and new hardware, plus very timely information on how TCP/IP secures connectivity for blogging, vlogging, photoblogging, and social networking. Step-by-step instructions show you how to install and set up TCP/IP on clients and servers; build security with encryption, authentication, digital certificates, and signatures; handle new voice and mobile technologies, and much more.

• Transmission Control Protocol / Internet Protocol (TCP/IP) is the de facto standard transmission medium worldwide for computer-to-computer communications; intranets, private internets, and the Internet are all built on TCP/IP
• The book shows you how to install and configure TCP/IP and its applications on clients and servers; explains intranets, extranets, and virtual private networks (VPNs); provides step-by-step information on building and enforcing security; and covers all the newest protocols
• You'll learn how to use encryption, authentication, digital certificates, and signatures to set up a secure Internet credit card transaction
  Find practical security tips, a Quick Start Security Guide, and still more in this practical guide.

Contenu

Introduction 1

About This Book 1

Conventions Used in This Book 2

Foolish Assumptions 2

How This Book Is Organized 3

Part I: TCP/IP from Names to Addresses 3

Part II: Getting Connected 3

Part III: Configuring Clients and Servers: Web, E-Mail, and Chat 4

Part IV: Even More TCP/IP Applications and Services 4

Part V: Network Troubleshooting and Security 4

Part VI: The Part of Tens 5

Icons Used in This Book 5

Where to Go from Here 6

Part I: TCP/IP from Names to Addresses 7

Chapter 1: Understanding TCP/IP Basics 9

Following Rules for the Internet: TCP/IP Protocols 10

Who's in charge of the Internet and TCP/IP? 10

Checking out RFCs: The written rules 12

Examining Other Standards Organizations That Add to the Rules 13

Distinguishing Between the Internet, an Internet, and an Intranet 13

Extending Intranets to Extranets 14

Introducing Virtual Private Networks 15

Exploring Geographically Based Networks 16

Networks connected by wires and cables 16

Wireless networks 17

The geography of TCP/IP 17

Chapter 2: Layering TCP/IP Protocols 19

Taking a Timeout for Hardware 19

Starting with network connection media 20

Colliding with Ethernet 20

Stacking the TCP/IP Layers 22

Layer 1: The physical layer 23

Layer 2: The data link layer 24

Layer 3: The internet layer 24

Layer 4: The transport layer 24

Layer 5: The application layer 25

TCP/IP For Dummies, 6th Edition viii

Chewing through Network Layers: A Packet's Journey 25

Understanding TCP/IP: More than just protocols 27

Determining whether your network has a protocol, an application, or a service 27

Plowing through the Protocol List (In Case You Thought Only Two Existed) 28

Physical layer protocols 29

Data link layer protocols 29

Internet layer protocols 29

Transport layer protocols 31

Application layer protocols 36

Chapter 3: Serving Up Clients and Servers 43

Understanding the Server Side 43

Examining the server's job 44

Identifying types of servers 44

Using dedicated servers 45

Understanding the Client Side 45

Defining a client 45

Clients, clients everywhere 46

Answering the Question Are You Being Served? 46

Supporting TCP/IP with Client/Server and Vice Versa 47

Recognizing Other Internetworking Styles: Peer-to-Peer Computing 47

Determining whether peer-to-peer workgroups are still handy 48

P2P applications P2P across the Internet 48

Chapter 4: Nice Names and Appetizing Addresses 51

What Did You Say Your Host's Name Is? 52

Playing the numbers game 52

Identifying a computer as uniquely yours 53

Translating names into numbers 54

Taking a Closer Look at IP Addresses 54

Savoring Classful Addressing 55

Recognizing the Parts of an IP Address 56

Class A is for a few enormous networks 57

Class B is for lots of big networks 57

Class C is for millions of small networks 57

Class D is for multicasting 57

Biting Down on Bits and Bytes 58

Obtaining an IP Address 60

Choosing whether to go public or stay private 60

Obeying the network police 61

Obtaining a globally unique IP address 61

Acquiring a static address 62

Getting dynamic addresses with DHCP 62

Finding out your IP address 62

Table of Contents ix

Resolving Names and Addresses with DNS 64

Understanding the minimum amount of information about DNS 64

Using DNS to Do Nifty Searches 65 Describing Fully Qualified Domain Names (FQ...