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Introduction to Data Communications

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Title: Introduction Author: Steve Armstrong Last modified by: Computer Services Department Created Date: 6/28/2002 7:04:26 PM Document presentation format – PowerPoint PPT presentation

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Title: Introduction to Data Communications


1
  • Introduction to Data Communications
  • ECI-M-917

http//eent3.lsbu.ac.uk/staff/baoyb/idc
Methods of Teaching and Learning Lecture,
Tutorial and Workshop
Assessment of the unit 2-hour written
examination -- 70 a laboratory report (BB
submission) -- 30
Lecturer Ya Bao and Vincent Siyau.
Textbook Computer Networks 4/E, by Andrew S.
Tanenbaum, Publisher Prentice-Hall, 2003. ISBN
0-13-038488-7.
2
Computer Networks 4th Edition
Andrew Tanenbaum
  • Benefits of purchasing this book
  • New problems and lab exercises at the end of each
    chapter helps reinforce concepts presented and
    pass your exams
  • Based on real-world networks and networking
    challenges, enabling you to apply theory to the
    types of problems you are most likely to
    encounter in industry
  • Companion Website containing PowerPoint slides
    and other learning tools

Available from Blackwells, London Road
e-book is available at (access from LSBU host)
http//0-proquest.safaribooksonline.com.lispac.l
sbu.ac.uk/0130661023
3
Background Reading
  • (essential for students who lack of communication
    background)

Data and Computer Communications 8/E, by W.
Stalling, Publisher Prentice-Hall, 2007.
4
  • Data Communications and Networking 4/E, by B.
    Forouzan, Publisher McGraw-Hill, 2006.

5
Simplified Communications Model - Diagram
Chapter 1 Introduction
6
Communications Tasks
Transmission system utilization Addressing
Interfacing Routing
Signal generation Recovery
Synchronization Message formatting
Exchange management Security
Error detection and correction Network management
Flow control
7
Networking
  • Point to point communication not usually
    practical
  • Devices are too far apart
  • Large set of devices would need impractical
    number of connections
  • Solution is a communications network
  • Wide Area Network (WAN)
  • Local Area Network (LAN)
  • Business Applications
  • Home Applications
  • Mobile Users
  • Social Issues

8
Classification of interconnected processors by
scale
  • Classification of interconnected processors by
    scale.

9
Protocols
  • Used for communications between entities in a
    system
  • Must speak the same language

10
Design Issues for the Layers
  • Addressing
  • Error Control
  • Flow Control
  • Multiplexing
  • Routing

11
Reference Models
  • The TCP/IP reference model.

12
Hybrid Model
  • The hybrid reference model to be used in this
    unit.

13
Example Networks
  • The Internet
  • Connection-Oriented Networks X.25, Frame
    Relay, and ATM
  • Ethernet 802.3
  • Wireless LANs 80211

Other networks PSTN (Public Switched Telephone
Network) GSM and UMTS
14
IEEE 802 Standards
The 802 working groups. The important ones are
marked with . The ones marked with ? are
hibernating. The one marked with gave up.
15
Metric Units
  • The principal metric prefixes.
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