1. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Overview of Data Communications and Networking PART I

2. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Overview

3. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Chapters Chapter 1 Introduction Chapter 2 Network Models

4. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Chapter 1 Introduction

5. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 1.1 Data Communication Components Data Representation Direction of Data Flow

6. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.1 Five components of data communication

7. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.2 Simplex

8. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.3 Half-duplex

9. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.4 Full-duplex

10. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 1.2 Networks Distributed Processing Network Criteria Physical Structures Categories of Networks

11. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.5 Point-to-point connection

12. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.6 Multipoint connection

13. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.7 Categories of topology

14. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.8 Fully connected mesh topology (for five devices)

15. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.9 Star topology

16. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.10 Bus topology

17. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.11 Ring topology

18. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.12 Categories of networks

19. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.13 LAN

20. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.13 LAN (Continued)

21. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.14 MAN

22. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.15 WAN

23. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 1.3 The Internet A Brief History The Internet Today

24. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Chronology of Internet Evolution (W. Stallings) 1996ARPA packet-switching experiment 1969First ARPANET nodes operational 1972Distributed e-mail invented 1973Non US computer linked to ARPANET 1975ARPANET transitioned to Defense Communications Agency 1980TCP/IP experiment began 1981New host added every twenty days 1983TCP/IP switchover complete

25. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Chronology of Internet Evolution continued (W. Stallings) 1986NSFnet backbone created 1990ARPANET retired 1991Gopher introduced 1991WWW invented 1992Mosaic introduced 1995Internet backbone privatized 1996OC-3 (155 Mbps) backbone built

26. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Growth of the Internet Exponential growth in the 1990s (Web technology is a major factor) More than 30-million computers were attached to the Internet in 1998 Doubling the size every 9 to 12 month in the 1990s

27. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004

28. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004

29. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 the original ARPANET design

30. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Growth of the ARPANET. (a) Dec. 1969. (b) July 1970. (c) March 1971. (d) April 1972. (e) Sept. 1972.

31. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 The NSFNET backbone in 1988.

32. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Figure 1.16 Internet today

33. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 1.4 Protocols and Standards Protocols Standards Standards Organizations Internet Standards

34. McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Websites http://www.isoc.org/internet/history/ http://www.isoc.org/internet/history/ http://www.zakon.org/robert/internet/timeline/ http://www.zakon.org/robert/internet/timeline/ http://www.nsrc.org/codes/bymap/ntlgy/ (Internetology: 1993-97, by continents, by date) http://www.w3.org/History.html (Web history) http://www.w3.org/History.html http://en.wikipedia.org/wiki/Internet_backbone http://en.wikipedia.org/wiki/Internet_backbone http://www.nthelp.com/maps.htm (backbone maps) http://www.nthelp.com/maps.htm http://directory.google.com/Top/Computers/Internet/Organiza tions/Internet_Backbone/ http://directory.google.com/Top/Computers/Internet/Organiza tions/Internet_Backbone/