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 Data Representation Text: ASCII (7 bits), Unicode (32 bits) Numbers: Binary numbers (bit patterns) Images: Bit patterns: pixels,resolution,RGB,YCM Audio: Continuous signal Video: Continous or discrete images

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

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

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

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

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

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

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

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

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

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

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

19. McGraw-Hill The McGraw-Hill Companies, Inc., 2004 Hybrid Networks Some networks are a combination:

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

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

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

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

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

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

26. McGraw-Hill The McGraw-Hill Companies, Inc., 2004 History.. Internet with a capital I :) 1969: ARPA (Advanced Research Projects Agency) of Department of Defense, USA 4 nodes: UCLA, UCSB,Stanford,Utah 1972: Vinc Cerf / Bob Kahn paper “Internetting Project” - TCP mentioned Split IP and TCP (IP=Datagram routing, TCP=segmentation,reassembly,error detection)

27. McGraw-Hill The McGraw-Hill Companies, Inc., 2004 Size of internet Started with 4 computers.. :) 1.407 billion users > 1,000,000,000,000 URLs. (1 trillion) Seems to double every 5.5 years

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

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

30. McGraw-Hill The McGraw-Hill Companies, Inc., 2004 Protocols Protocol: Set of rules that govern data communications. Syntax: Structure of data Semantics: Meaning of each section of bits. Timing: When can data be sent, and How fast

31. McGraw-Hill The McGraw-Hill Companies, Inc., 2004 Standards De Facto: Not approved by an organized body. QWERTY, AA battery De Jure: Standards legalized by an official body. ISO: International Organization for Standardization ITU-T: International Telecomm Union (UN) ANSI: American National Standards Institute IEEE: Institute of Electrical and Electronics Engineers FCC: Federal Comm Commission (Radio/TV/comm)