The document provides an introduction to computer networking, discussing the importance of networks and how devices connect to them through various means like cable modems and LANs. It outlines the structure of enterprise and small office networks, the concept of interconnected networks, and the evolution of data sharing methods. Additionally, it explains the technical components involved, such as ethernet cards, hubs, and the use of numeric and name addressing for communication.

1. Any Questions?

2. Chapter 1
• Introduction to Computer Networking
Topics
– Quick overview of why we might want
networks
– Introduction to ideas

3. Perspectives on Networks
• How do we connect to networks
– Cable Modem
– Office LAN
• Connection is ready to go

4. Enterprise Networking
• Created by a company to let workers
communicate

5. Small Office/Home Office (SOHO)
Networking
• Communicate with enterprise, or other
web servers

6. Interconnected Networks
• Most enterprise networks connect to an
ISP
• Most ISPs interconnect
• The Internet

7. Flinstones Network
• How do users share date before networks
– Sneakernet
• How can we interconnect computers
– Two-wire Networking cards
• Send Wire
• Receive wire

8. Sharing Data
• Send transmit from one PC to all PCs
– Multi-port Repeater
• Hub

9. Sharing Data
• Now all PCs see all data
– Need addressing so PC knows when to
display information

10. Distributing Data

11. Making it easy
• Use names instead of number addresses

12. Summing Up
• Ethernet cards in each computer
• Cards have unique numeric addresses
• Ethernet cables connect cards to hubs
– Hubs repeat the data to other ports
• Cabling is typically in a star configuration
• Users use names, but the computer
speaks in addresses

13. Any Questions?