1. Chapter 12 Computer Networks

2. Basic Concepts in Computer Networking – Communication Links – Figure 12.1a –Two Forms of Information Representation (a) Analog Information

3. Basic Concepts in Computer Networking – Communication Links – Figure 12.1b Two Forms of Information representation (b) Digital Information

4. Basic Concepts in Computer Networking – Communication Links – Figure 12.2 Modulation of a Carrier to Encode Binary Information

5. Basic Concepts in Computer Networking – Local Area Networks (LANs) - Figure 12.4a An Ethernet LAN implemented using cables – (a) A Single Shared Cable Configuration

6. Basic Concepts in Computer Networking – Local Area Networks (LANs) - Figure 12.4b An Ethernet LAN Implemented Using Cables – (b) A Multiple Cable Configuration

7. Basic Concepts in Computer Networking – Local Area Networks (LANs) - Figure 12.5 An Ethernet LAN Implemented Using a Hub

8. Basic Area Networks (WANs) Figure 12. 6 Sending Messages Across the Ethernet

9. Basic Concepts in Computer Networking – Wide Area Networks (WANs) – Figure 12.7 General Structure of a Wide Area Network

10. Basic Concepts in Computer Networking – Wide Area Networks (WANs) To See How An Acknowledgment Message Works, Use the Following Diagram

11. Basic Concept in Computer Networking – Wide Area Networks (WANs) – Figure 12. 8 Store-and-Forward Packet Switching

12. Basic Concept in Computer Networking – Wide Area Network (WANs) – Figure 12.9 Typical LAN/WAN Network Configuration

13. Network Services – Figure 12.10 The Client-Server Model of Network Computing

14. History of the Internet and the World Wide Web – The Internet – Figure 12.11 Network of Networks

15. History of the Internet and the World Wide Web – The Internet – Figure 12.12 State of Networking in the Late 1980s

16. History of the Internet and the World Wide Web - The Internet – Figure 12.13 Number of Host Computers on the Internet

17. History of the Internet and the World Wide Web – The World Wide Web – Figure 12.14 Hypertext Documents

18. The History of the Internet and the World Wide Web – The World Wide Web – Figure 12.15 Operation of the Web

19. Basic Concept in Computer Networking – In Conclusion – Exercises –This Diagram Shows Where the Numbers Represent the Time Delays across a Link