DATA COMMUNICATION
PRINCIPLES
For Fixed and Wireless Networks
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DATA COMMUNICATION
PRINCIPLES
For Fixed and Wireless Networks
Aftab Ahmad
KLUWER ACADEMIC PUBLISHERS
NEW YORK, BOSTON, DORDRECHT, LONDON, MOSCOW
eBook ISBN: 0-306-47793-9
Print ISBN: 1-4020-7328-3
©2002 Kluwer Academic Publishers
New York, Boston, Dordrecht, London, Moscow
Print ©2003 Kluwer Academic Publishers
All rights reserved
No part of this eBook may be reproduced or transmitted in any form or by any means, electronic,
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Dordrecht
NOTE TO INSTRUCTORS
As an aid to instructors interested in teaching this book as a course,
exercises suitable for use in a classroom setting are available by
contacting the author at [email protected].
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To my parents
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1.4.3.
Local Area Networks (LANs)
Wide Area Networks (WANs)
Metropolitan Area Networks (MANs)
1.5.
Network Protocol Architecture
1.5.1.
1.5.2.
1.5.3.
Protocols
Standards
Protocol Architecture
1.6.
Example of a Protocol Architecture
1.6.1.
Open System
1.7.
Summary
1.8.
Review Questions
Network Architectures - Examples
2.
2.1.
The OSI Reference Model (OSI-RM)
2.1.1.
2.1.2.
2.1.3.
2.1.4.
2.1.5.
OSI-RM Characteristics and Terminology

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2.3.
The IEEE Wireless Local Area Network (IEEE WLAN)
2.3.1.
2.3.2.
2.3.3.
2.3.4.
Local Area Networks
Wireless Local Area Networks
The Physical Layer (PHY)
The Medium Access Control (MAC) Layer

3.2.5.
3.2.6.
3.2.7.
3.2.8.
Sequence of Events and Definitions
Modulation of data and signals
Digital Encoding of Data
Non-Return to Zero (NRZ)
Multilevel Encoding
Manchester Coding
General Characteristics of Bit Encoding
Zero-substitution and nB/NB Translation
3.3.
Passband Modulation
3.3.1.
3.3.2.
The Carrier Signal
Analog Modulation
3.4.
Digital Modulation
3.4.1.
3.4.2.
3.4.3.
Amplitude Shift Keying (ASK)
Frequency Shift Keying (FSK)
Phase Shift Keying (PSK)
3.5.
The User Data
3.5.1.
3.5.2.

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