,DATA AND COMPUTER
COMMUNICATIONS
Eighth Edition
William Stallings
Upper Saddle River, New Jersey 07458
,Library of Congress Cataloging-in-Publication Data on File
Vice President and Editorial Director, ECS: Art Editor: Gregory Dulles
Marcia J. Horton Director, Image Resource Center: Melinda Reo
Executive Editor: Tracy Dunkelberger Manager, Rights and Permissions: Zina Arabia
Assistant Editor: Carole Snyder Manager,Visual Research: Beth Brenzel
Editorial Assistant: Christianna Lee Manager, Cover Visual Research and Permissions:
Executive Managing Editor: Vince O’Brien Karen Sanatar
Managing Editor: Camille Trentacoste Manufacturing Manager, ESM: Alexis Heydt-Long
Production Editor: Rose Kernan Manufacturing Buyer: Lisa McDowell
Director of Creative Services: Paul Belfanti Executive Marketing Manager: Robin O’Brien
Creative Director: Juan Lopez Marketing Assistant: Mack Patterson
Cover Designer: Bruce Kenselaar
Managing Editor,AV Management and Production:
Patricia Burns
©2007 Pearson Education, Inc.
Pearson Prentice Hall
Pearson Education, Inc.
Upper Saddle River, NJ 07458
All rights reserved. No part of this book may be reproduced in any form or by any means, without permission
in writing from the publisher.
Pearson Prentice Hall™ is a trademark of Pearson Education, Inc.
All other tradmarks or product names are the property of their respective owners.
The author and publisher of this book have used their best efforts in preparing this book.These efforts include the
development, research, and testing of the theories and programs to determine their effectiveness.The author and
publisher make no warranty of any kind, expressed or implied, with regard to these programs or the documentation
contained in this book.The author and publisher shall not be liable in any event for incidental or consequential
damages in connection with, or arising out of, the furnishing, performance, or use of these programs.
Printed in the United States of America
10 9 8 7 6 5 4 3 2 1
ISBN: 0-13-243310-9
Pearson Education Ltd., London
Pearson Education Australia Pty. Ltd., Sydney
Pearson Education Singapore, Pte. Ltd.
Pearson Education North Asia Ltd., Hong Kong
Pearson Education Canada, Inc., Toronto
Pearson Educaci n de Mexico, S.A. de C.V.
Pearson Education Japan, Tokyo
Pearson Education Malaysia, Pte. Ltd.
Pearson Education, Inc., Upper Saddle River, New Jersey
, For my scintillating wife
ATS
COMMUNICATIONS
Eighth Edition
William Stallings
Upper Saddle River, New Jersey 07458
,Library of Congress Cataloging-in-Publication Data on File
Vice President and Editorial Director, ECS: Art Editor: Gregory Dulles
Marcia J. Horton Director, Image Resource Center: Melinda Reo
Executive Editor: Tracy Dunkelberger Manager, Rights and Permissions: Zina Arabia
Assistant Editor: Carole Snyder Manager,Visual Research: Beth Brenzel
Editorial Assistant: Christianna Lee Manager, Cover Visual Research and Permissions:
Executive Managing Editor: Vince O’Brien Karen Sanatar
Managing Editor: Camille Trentacoste Manufacturing Manager, ESM: Alexis Heydt-Long
Production Editor: Rose Kernan Manufacturing Buyer: Lisa McDowell
Director of Creative Services: Paul Belfanti Executive Marketing Manager: Robin O’Brien
Creative Director: Juan Lopez Marketing Assistant: Mack Patterson
Cover Designer: Bruce Kenselaar
Managing Editor,AV Management and Production:
Patricia Burns
©2007 Pearson Education, Inc.
Pearson Prentice Hall
Pearson Education, Inc.
Upper Saddle River, NJ 07458
All rights reserved. No part of this book may be reproduced in any form or by any means, without permission
in writing from the publisher.
Pearson Prentice Hall™ is a trademark of Pearson Education, Inc.
All other tradmarks or product names are the property of their respective owners.
The author and publisher of this book have used their best efforts in preparing this book.These efforts include the
development, research, and testing of the theories and programs to determine their effectiveness.The author and
publisher make no warranty of any kind, expressed or implied, with regard to these programs or the documentation
contained in this book.The author and publisher shall not be liable in any event for incidental or consequential
damages in connection with, or arising out of, the furnishing, performance, or use of these programs.
Printed in the United States of America
10 9 8 7 6 5 4 3 2 1
ISBN: 0-13-243310-9
Pearson Education Ltd., London
Pearson Education Australia Pty. Ltd., Sydney
Pearson Education Singapore, Pte. Ltd.
Pearson Education North Asia Ltd., Hong Kong
Pearson Education Canada, Inc., Toronto
Pearson Educaci n de Mexico, S.A. de C.V.
Pearson Education Japan, Tokyo
Pearson Education Malaysia, Pte. Ltd.
Pearson Education, Inc., Upper Saddle River, New Jersey
, For my scintillating wife
ATS
