ptg7068940 www.it-ebooks.info ptg7068940 800 East 96th Street, Indianapolis, Indiana, 46240 USA Joe Casad Sams Teach Yourself 24 in Hours TCP/IP www.it-ebooks.info ptg7068940 Sams Teach Yourself TCP/IP in 24 Hours Copyright © 2012 by Pearson Education, Inc. All rights reserved. No part of this book shall be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission from the publisher. No patent liability is assumed with respect to the use of the information contained herein. Although every precaution has been taken in the preparation of this book, the publisher and author assume no responsibility for errors or omissions. Nor is any liability assumed for damages resulting from the use of the information contained herein. ISBN-13: 978-0-672-33571-6 ISBN-10: 0-672-33571-9 Library of Congress Cataloging-in-Publication Data Casad, Joe, 1958- Sams teach yourself TCP/IP in 24 hours / Joe Casad. — 5th ed. p. cm. ISBN 978-0-672-33571-6 (pbk. : alk. paper) 1. TCP/IP (Computer network protocol) I. Title. II. Title: Teach yourself TCP/IP in 24 hours. TK5105.585.C37 2012 005.7’1376—dc23 2011032322 Printed in the United States of America First Printing November 2011 Trademarks All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Sams Publishing cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark. Warning and Disclaimer Every effort has been made to make this book as complete and as accurate as possible, but no warranty or fitness is implied. The information provided is on an “as is” basis. The author and the publisher shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this book. Bulk Sales Sams Publishing offers excellent discounts on this book when ordered in quantity for bulk pur- chases or special sales. For more information, please contact U.S. Corporate and Government Sales 1-800-382-3419 corpsales@pearsontechgroup.com For sales outside of the U.S., please contact International Sales international@pearson.com Editor-in-Chief Mark Taub Acquisitions Editor Trina MacDonald Development Editor Michael Thurston Managing Editor Kristy Hart Project Editor Andy Beaster Copy Editor Keith Cline Indexer Lisa Stumpf Proofreader Debbie Williams Technical Editor Jon Snader Publishing Coordinator Olivia Basegio Book Designer Gary Adair Compositor Gloria Schurick www.it-ebooks.info ptg7068940 Contents at a Glance Introduction 1 Part I: TCP/IP Basics HOUR 1 What Is TCP/IP? 7 2 How TCP/IP Works 23 Part II: The TCP/IP Protocol System HOUR 3 The Network Access Layer 37 4 The Internet Layer 51 5 Subnetting and CIDR 73 6 The Transport Layer 89 7 The Application Layer 113 Part III: Networking with TCP/IP HOUR 8 Routing 127 9 Getting Connected 149 10 Name Resolution 177 11 TCP/IP Security 211 12 Configuration 255 13 IPv6: The Next Generation 281 Part IV: Tools HOUR 14 TCP/IP Utilities 301 15 Monitoring and Remote Access 323 16 Classic Services 345 Part V: The Internet HOUR 17 The Internet: A Closer Look 365 18 HTTP, HTML, and the World Wide Web 375 19 The New Web 397 www.it-ebooks.info ptg7068940 Part VI: TCP/IP At Work HOUR 20 Web Services 421 21 Email 437 22 Streaming and Casting 457 23 Living in the Cloud 471 24 Implementing a TCP/IP Network: 7 Days in the Life of a Sys Admin 487 APPENDIX A Answers to Quizzes and Exercises 501 Index 515 iv Teach Yourself TCP/IP in 24 Hours www.it-ebooks.info ptg7068940 Table of Contents Introduction 1 Part I: TCP/IP Basics HOUR 1: What Is TCP/IP? 7 Networks and Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 The Development of TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 TCP/IP Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Standards Organizations and RFCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 HOUR 2: How TCP/IP Works 23 The TCP/IP Protocol System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 TCP/IP and the OSI Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Data Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 A Quick Look at TCP/IP Networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Part II: The TCP/IP Protocol System HOUR 3: The Network Access Layer 37 Protocols and Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 The Network Access Layer and the OSI Model . . . . . . . . . . . . . . . . . . . . . . . . . 39 Network Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Physical Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Anatomy of an Ethernet Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 HOUR 4: The Internet Layer 51 Addressing and Delivering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Internet Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Address Resolution Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Reverse ARP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Internet Control Message Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Other Internet Layer Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 www.it-ebooks.info ptg7068940 HOUR 5: Subnetting and CIDR 73 Subnets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Dividing the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 Converting a Subnet Mask to Dotted-Decimal Notation . . . . . . . . . . . . . . . . . 77 Working with Subnets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Classless Interdomain Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 HOUR 6: The Transport Layer 89 Introducing the Transport Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Transport Layer Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Understanding TCP and UDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Firewalls and Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 HOUR 7: The Application Layer 113 What Is the Application Layer? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 The TCP/IP Application Layer and OSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 Network Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 APIs and the Application Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 TCP/IP Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 Part III: Networking with TCP/IP HOUR 8: Routing 127 Routing in TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Routing on Complex Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Examining Interior Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Exterior Routers: BGP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 Classless Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Higher in the Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 HOUR 9: Getting Connected 149 Dial-Up Networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Cable Broadband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 Digital Subscriber Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 Wide Area Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 Wireless Networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 Connectivity Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 vi Teach Yourself TCP/IP in 24 Hours www.it-ebooks.info ptg7068940 HOUR 10: Name Resolution 177 What Is Name Resolution? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Name Resolution Using Hosts Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 DNS Name Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181 Registering a Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 Name Server Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 Dynamic DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198 NetBIOS Name Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 HOUR 11: TCP/IP Security 211 What Is a Firewall? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211 Attack Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 What Do Intruders Want? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 Encryption and Secrecy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 HOUR 12: Configuration 255 Getting on the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255 The Case for Server-Supplied IP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 What Is DHCP? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257 How DHCP Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258 DHCP Server Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261 Network Address Translation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 Zero Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264 Configuring TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268 HOUR 13: IPv6: The Next Generation 281 Why a New IP? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281 IPv6 Header Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284 IPv6 Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287 Subnetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289 Multicasting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289 Link Local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290 Neighbor Discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290 Autoconfiguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291 IPv6 and Quality of Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291 IPv6 with IPv4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292 IPv6 Tunnels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293 Contents vii www.it-ebooks.info ptg7068940 Part IV: Tools HOUR 14: TCP/IP Utilities 301 Connectivity Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302 Protocol Dysfunction and Misconfiguration . . . . . . . . . . . . . . . . . . . . . . . . . . 302 Line Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310 Name Resolution Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310 Network Performance Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311 HOUR 15: Monitoring and Remote Access 323 Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 Berkeley Remote Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326 Secure Shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330 Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331 Network Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332 Simple Network Management Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333 Remote Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338 HOUR 16: Classic Services 345 HTTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346 Email . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347 FTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347 Trivial File Transfer Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352 File and Print Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352 Lightweight Directory Access Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355 Part V: The Internet HOUR 17: The Internet: A Closer Look 365 How the Internet Looks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365 What Happens on the Internet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368 URIs and URLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370 HOUR 18: HTTP, HTML, and the World Wide Web 375 What Is the World Wide Web? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375 Understanding HTML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378 Understanding HTTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384 Scripting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387 Web Browsers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390 viii Teach Yourself TCP/IP in 24 Hours www.it-ebooks.info ptg7068940 HOUR 19: The New Web 397 Web 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397 Peer to Peer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402 IRC and IM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404 The Semantic Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406 XHTML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408 HTML5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409 Part VI: TCP/IP At Work HOUR 20: Web Services 421 Understanding Web Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421 XML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424 SOAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425 WSDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426 Web Service Stacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427 REST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428 E-Commerce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431 HOUR 21: Email 437 What Is Email? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 437 Email Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 438 How Email Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 440 Simple Mail Transfer Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442 Retrieving the Mail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444 Email Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446 Webmail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449 Spam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 HOUR 22: Streaming and Casting 457 The Streaming Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457 Multimedia Environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459 Real-time Transport Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459 Transport Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 462 Multimedia Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 463 Podcasting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465 Voice over IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 466 Contents ix www.it-ebooks.info [...]... topic in a few easy and accessible sessions Sams Teach Yourself TCP/IP in 24 Hours, Fifth Edition, is divided into six parts Each part brings you a step closer to mastering the goal of proficiency in TCP/IP Part I, TCP/IP Basics,” introduces you to TCP/IP and the TCP/IP protocol stack Part II, “The TCP/IP Protocol System,” takes a close look at each of TCP/IP s protocol layers: the Network Access,... Introduction Welcome to Sams Teach Yourself TCP/IP in 24 Hours, Fifth Edition This book provides a clear and concise introduction to TCP/IP for newcomers, and also for users who have worked with TCP/IP but would like a little more of the inside story Unlike other networking primers that point and click around the hard topics, Sams Teach Yourself TCP/IP in 24 Hours takes you down deep into the technology... operate at each of TCP/IP s layers Part III, “Networking with TCP/IP, ” describes some of the devices, services, and utilities necessary for supporting TCP/IP networks You learn about routing and network hardware, DHCP, DNS, and IPv6 www.it-ebooks.info 2 Teach Yourself TCP/IP in 24 Hours Part IV, “Tools,” introduces some of the common utilities used to configure, manage, and troubleshoot TCP/IP networks... services Part VI, TCP/IP at Work,” provides a memorable case study showing how the components of TCP/IP interact in a real working environment The concepts in this book, like TCP/IP itself, are independent of any operating system and descend from the standards defined in Internet Requests for Comment (RFCs) How This Book Is Organized Each hour in Sams Teach Yourself TCP/IP in 24 Hours, Fifth Edition,...x Teach Yourself TCP/IP in 24 Hours HOUR 23: Living in the Cloud 471 What Is the Cloud? The User’s Cloud The IT Cloud Future of Computing 471 472 478 484 HOUR 24: Implementing a TCP/IP Network: 7 Days... left blank www.it-ebooks.info PART I TCP/IP Basics HOUR 1 What Is TCP/IP? HOUR 2 How TCP/IP Works www.it-ebooks.info 7 23 This page intentionally left blank www.it-ebooks.info [(H3F)] HOUR 1 What Is TCP/IP? What You’ll Learn in This Hour: Networks and network protocols History of TCP/IP Important features of TCP/IP Transport Control Protocol/Internet Protocol (TCP/IP) is a protocol system—a collection... processing TCP/IP transmissions is performed by a software component known as the vendor’s implementation of TCP/IP For instance, a TCP/IP software component in Microsoft Windows enables Windows computers to process TCP/IP- formatted data and thus to participate in a TCP/IP network As you read this book, be aware of the following distinction: A TCP/IP standard is a system of rules defining communication on TCP/IP. .. Basegio, Keith Cline, Andy Beaster, and Jon Snader for their patience and good advice I also want to acknowledge the following individuals for their contributions to previous editions of Sams Teach Yourself TCP/IP in 24 Hours: Bob Willsey, Sudha Putnam, Walter Glenn, Art Hammond, Jane Brownlow, Jeff Koch, Mark Renfrow, Vicki Harding, Mark Cierzniak, Marc Charney, Jenny Watson, and Betsy Harris A special... Implementations The important distinction between the TCP/IP standards and a TCP/IP implementation is often blurred in popular discussions of TCP/IP and this is sometimes , confusing for readers For instance, authors often talk about the layers of the TCP/IP model providing services for other layers In fact, it is not the TCP/IP model that provides services The TCP/IP model defines the services that should... networking@samspublishing.com Mark Taub Editor-in-Chief Sams Publishing 1330 Avenue of the Americas New York, NY 10019 USA Reader Services Visit our website and register this book at informit.com/register for convenient access to any updates, downloads, or errata that might be available for this book www.it-ebooks.info This page intentionally left blank www.it-ebooks.info Introduction Welcome to Sams Teach Yourself . Indianapolis, Indiana, 4 6240 USA Joe Casad Sams Teach Yourself 24 in Hours TCP/IP www.it-ebooks.info ptg7068940 Sams Teach Yourself TCP/IP in 24 Hours Copyright. in the Sams Teach Yourself series are designed to help you learn a topic in a few easy and accessible sessions. Sams Teach Yourself TCP/IP in 24 Hours,