文档介绍：working Devices: Operation, Utilization and LAN and WAN working, FourthEdition
Gilbert Held
Copyright # 2001 John Wiley & Sons Ltd
ISBNs: 0-471-97515-X (Paper); 0-470-84182-6 (Electronic)
MUNICATIONS
NETWORKING DEVICES:
OPERATION, UTILIZATION AND
LAN AND WAN WORKING
Fourth Edition
MUNICATIONS
NETWORKING DEVICES:
OPERATION, UTILIZATION
AND LAN AND WAN
WORKING
Fourth Edition
Gilbert Held
4-Degree Consulting
Macon, ia
USA
JOHN WILEY &SONS
Chichester . New York . Weinheim . Brisbane . Singapore . Toronto
Copyright # 1986, 1989, 1992, 1999 by John Wiley & Sons Ltd
Baf®ns Lane, Chichester,
West Sussex PO19 1UD, England
National 01243 779777
International $+44) 1243 779777
e-mail $for orders and customer service enquiries): cs-******@
Visit our Home Page on or
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, scanning or
otherwise, except under the terms of the Copyright Designs and Patents Act, 1988 or under the terms of
a licence issued by the Copyright Licensing Agency, 90 Tottenham Court Road, London W1P 9HE,
UK, without the permission in writing of the Publisher, with the exception of any material supplied
speci®cally for the purpose of being entered and executed on puter system, for exclusive use by the
purchaser of the publication.
Neither the authors nor John Wiley & Sons Ltd accept any responsibility or liability for loss or damage
occasioned to any person or property through using the material, instructions, methods or ideas
contained herein, or acting or refraining from acting as a result of such use. The authors and Publishers
expressly disclaim all implied warranties, including merchantability of ®tness for any particular purpose.
Designations used panies to distinguish their products are often claimed as trademarks. In all
instances where John Wil